Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net loss	$ (2,826)	$ (7,634)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	377	1,413
Reduction in allowance for doubtful accounts	(1)	(17)
Lease termination charges	0	3,337
Loss on disposal of and write down of property, equipment and other	0	53
Increase in accrued investment income	(30)	(23)
Stock-based compensation	250	109
Adjustment to contingent consideration	(318)	(98)
Change in operating assets and liabilities:
Accounts receivable	322	(19)
Inventories	285	630
Deferred cost of goods sold	(35)	190
Other current assets	435	(418)
Accounts payable	(130)	(1,509)
Accrued liabilities	(965)	(55)
Deferred revenues	364	6
Deferred rent	93	(154)
Net cash used in operating activities	(2,179)	(4,189)
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of available‑for‑sale short‑term investments	(17,972)	(7,984)
Proceeds from maturities and sales of available‑for‑sale short‑term investments	23,155	20,852
Change in other long‑term assets	(63)	(793)
Capital expenditures	(84)	(83)
Net cash provided by investing activities	5,036	11,992
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Principal payments of lease financing obligations	0	(11,147)
Repurchase of common stock from employees for payment of taxes on vesting of restricted stock units and upon exercise of stock options	(42)	(152)
Net cash used in financing activities	(42)	(11,299)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(19)	(639)
NET CHANGE IN CASH AND CASH EQUIVALENTS	2,796	(4,135)
CASH AND CASH EQUIVALENTS:
Beginning of period	7,691	13,340
End of period	10,487	9,205
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest on lease financing obligations	0	386
Cash paid for income taxes	$ 128	$ 187