Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 6,436	$ 7,772
Restricted cash	5	5
Accounts receivable, net	835	1,374
Inventories	924	1,195
Prepaid expenses and other current assets	204	338
Total current assets	8,404	10,684
Property, plant and equipment, net	606	525
Intangibles, net	122	69
Deferred income taxes	370	493
Other assets	59	59
Total assets	9,561	11,830
Current liabilities
Accounts payable	260	255
Accrued liabilities	331	345
Accrued income taxes	60	103
Total current liabilities	651	703
Total liabilities	651	703
Commitments and contingencies (see note 9)
Stockholders' equity
Preferred stock, $0.01 par value: 1,000 shares authorized, no shares issued or outstanding
Common stock, $0.001 par value: 30,000 shares authorized, 6,483 and 7,336 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively	7	7
Additional paid-in-capital	57,845	60,527
Accumulated other comprehensive income	(70)	41
Accumulated deficit	(48,872)	(49,448)
Total stockholders' equity	8,910	11,127
Total liabilities and stockholders' equity	$ 9,561	$ 11,830