Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 5,404	$ 4,435
Accounts receivable, net	1,735	1,599
Inventories	1,285	1,015
Prepaid expenses and other current assets	208	298
Total current assets	8,632	7,347
Property, plant and equipment, net	312	176
Intangibles, net	9	13
Other assets	61	26
Total assets	9,014	7,562
Current liabilities:
Accounts payable	604	484
Accrued liabilities	286	304
Deferred revenue, current	71	71
Total current liabilities	961	859
Deferred revenue, long term	13	40
Total liabilities	974	899
Commitments and contingencies (See note 9)
Stockholders' equity:
Common stock, $0.001 par value: 30,000 shares authorized, 7,326 and 7,326 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	7	7
Additional paid-in-capital	60,294	60,251
Accumulated deficit	(52,261)	(53,595)
Total stockholders' equity	8,040	6,663
Total liabilities and stockholders' equity	$ 9,014	$ 7,562