Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 21,408	$ 25,116
Restricted time deposits	284	272
Accounts receivable, net	16,575	14,295
Inventories	9,782	9,657
Other current assets	6,949	2,378
Total current assets	54,998	51,718
Property and equipment, net	2,952	3,130
Intangible assets, net	983	1,064
Other assets	262	348
Total assets	59,195	56,260
Current liabilities:
Deferred consideration payable	233	233
Accounts payable	7,471	8,353
Accrued liabilities	9,226	9,195
Deferred revenue	5,480	6,146
Other current liabilities	4,786	156
Total current liabilities	27,196	24,083
Other long-term liabilities	3,831	3,478
Commitments and contingencies (Note 14)
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---8,429 shares in 2016 and 8,341 shares in 2015; Outstanding — 6,839 shares in 2016 and 6,982 shares in 2015	270	270
Additional paid-in capital	1,287,810	1,287,336
Accumulated deficit	(1,240,407)	(1,239,308)
Treasury stock — 1,623 shares in 2017 and 2016	(18,098)	(18,098)
Accumulated other comprehensive loss	(1,407)	(1,501)
Total stockholders' equity	28,168	28,699
Total liabilities and stockholders' equity	$ 59,195	$ 56,260