Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS PROVIDED BY (USED IN) OPERATING ACTIVITIES:
Net loss	$ (953)	$ (1,424)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	144	601
Increase in allowance for doubtful accounts	0	37
Increase in accrued investment income	(11)	(8)
Stock-based compensation	77	157
Adjustment to contingent consideration	(318)	(101)
Change in operating assets and liabilities:
Accounts receivable	(189)	(136)
Inventories	(433)	87
Deferred cost of goods sold	40	(22)
Other current assets	41	(231)
Accounts payable	113	(1,459)
Accrued liabilities	(904)	14
Deferred revenues	(131)	141
Deferred rent	109	(9)
Net cash used in operating activities	(2,415)	(2,353)
CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES:
Purchases of available‑for‑sale short‑term investments	(3,992)	(3,991)
Proceeds from maturities and sales of available‑for‑sale short‑term investments	4,000	4,000
Change in other long‑term assets	0	16
Capital expenditures	(5)	(113)
Net cash provided by (used in) investing activities	3	(88)
CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES:
Principal payments of lease financing obligations	0	(587)
Repurchase of common stock from employees for payment of taxes on vesting of restricted stock units and upon exercise of stock options	(1)	(104)
Net cash used in financing activities	(1)	(691)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	10	(851)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(2,403)	(3,983)
CASH AND CASH EQUIVALENTS:
Beginning of period	7,691	13,340
End of period	5,288	9,357
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for interest on lease financing obligations	0	252
Cash paid for income taxes	$ 53	$ 69