Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 24,810	$ 26,169
Restricted time deposits	5,168	5,190
Accounts receivable, net	15,928	14,837
Inventories, net	8,407	10,226
Other current assets	1,983	6,851
Total current assets	56,296	63,273
Property and equipment, net	3,593	4,050
Intangible asset, net	1,031	1,153
Other assets	478	608
Total assets	61,398	69,084
Current liabilities:
Deferred consideration payable	233	233
Accounts payable	5,959	5,749
Accrued liabilities	9,398	9,972
Deferred revenue	7,086	7,642
Other current liabilities	378	196
Total current liabilities	23,054	23,792
Other long-term liabilities	3,964	3,846
Commitments and contingencies
Stockholders' equity:
Preferred Stock, $0.01 par value: Authorized — 1,000 shares; no shares issued or outstanding	0	0
Common Stock, $0.0017 par value: Authorized---16,000 shares; Issued---8,330 shares in 2015 and 8,242 shares in 2014; Outstanding — 6,972 shares in 2015 and 7,386 shares in 2014	270	270
Additional paid-in capital	1,286,475	1,285,787
Accumulated deficit	(1,233,590)	(1,227,671)
Treasury stock — 1,547 shares in 2016 and 1,359 shares in 2015	(17,227)	(15,355)
Accumulated other comprehensive loss	(1,548)	(1,585)
Total stockholders' equity	34,380	41,446
Total liabilities and stockholders' equity	$ 61,398	$ 69,084