v3.10.0.1

Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net loss	$ (7,403)	$ (6,264)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	327	372
Accretion (amortization) of premium on available-for-sale securities	(32)	30
Amortization of leasehold incentive obligation	(110)	(110)
Stock-based compensation for employees and non-employee directors	1,008	1,680
Stock-based compensation for non-employees	11	11
Change in operating assets and liabilities:
Accounts receivable	6,329	2,541
Inventories	(312)	122
Other current assets	184	(36)
Accounts payable, accrued expenses and other current liabilities	(1,104)	(1,012)
Deferred rent	(290)	(283)
Net cash used in operating activities	(1,392)	(2,949)
Investing activities
Purchases of property and equipment	(104)	(339)
Purchases of available-for-sale securities	(6,830)	(3,206)
Maturities of available-for-sale securities	6,300	6,250
Net cash (used in) provided by investing activities	(634)	2,705
Financing activities
Proceeds from issuance of common stock, net of issuance costs	279	2,179
Net cash provided by financing activities	279	2,179
Net change in cash and cash equivalents	(1,747)	1,935
Cash and cash equivalents at beginning of period	6,233	3,587
Cash and cash equivalents at end of period	4,486	5,522
Supplemental disclosure of cash flow information:
Purchases of property and equipment included in accounts payable, accrued expenses and other current liabilities at period end		$ 73

This element represents the noncash reduction in the leasehold incentive obligation.

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The net change during the reporting period in the amount due that is the result of the cumulative difference between actual rent due and rental expense recognized on a straight-line basis.

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The aggregate amount of noncash, equity-based employee and non-employee directors remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid.

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Amount of increase (decrease) in current assets classified as other.

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Fair value of share-based compensation granted to nonemployees as payment for services rendered or acknowledged claims.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity.

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