Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net loss	$ (1,524)	$ (6,587)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	261	1,076
Increase in allowance for doubtful accounts	2	17
Lease termination charges	0	3,337
Increase in accrued investment income	(20)	(16)
Stock-based compensation	62	(47)
Adjustment to contingent consideration	(318)	(96)
Change in operating assets and liabilities:
Accounts receivable	364	110
Inventories	79	317
Deferred cost of goods sold	(230)	145
Other current assets	219	(285)
Accounts payable	(791)	(1,441)
Accrued liabilities	(1,022)	(279)
Deferred revenues	1,038	(322)
Deferred rent	99	(148)
Net cash used in operating activities	(1,781)	(4,219)
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of available‑for‑sale short‑term investments	(7,988)	(3,991)
Proceeds from maturities and sales of available‑for‑sale short‑term investments	13,000	12,852
Change in other long‑term assets	0	0
Capital expenditures	(67)	(16)
Net cash provided by investing activities	4,945	8,845
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Principal payments of lease financing obligations	0	(10,888)
Repurchase of common stock from employees for payment of taxes on vesting of restricted stock units and upon exercise of stock options	(32)	(129)
Net cash used in financing activities	(32)	(11,017)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(16)	(448)
NET CHANGE IN CASH AND CASH EQUIVALENTS	3,116	(6,839)
CASH AND CASH EQUIVALENTS:
Beginning of period	7,691	13,340
End of period	10,807	6,501
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest on lease financing obligations	0	382
Cash paid for income taxes	$ 85	$ 119