Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 27,455	$ 28,611
Trade accounts receivable, net of allowance for doubtful accounts of $146 and $146, respectively	9,817	5,377
Inventories	3,921	3,676
Prepaid expenses and other current assets	374	342
Total current assets	41,567	38,006
Property and equipment:
Machinery and equipment	4,418	4,383
Leasehold improvements	604	603
Gross property and equipment	5,022	4,986
Less: accumulated depreciation	(4,088)	(4,042)
Net property and equipment	934	944
Deferred tax assets	1,116	1,110
Goodwill	1,706	1,706
Intangible assets, net	822	875
Restricted certificates of deposit	175	175
Other assets	33	28
Total assets	46,353	42,844
Current liabilities:
Accounts payable	1,833	1,368
Accrued wages and benefits	1,191	1,588
Accrued rent	544	572
Accrued professional fees	408	419
Accrued sales commissions	435	287
Domestic and foreign income taxes payable	1,625	575
Other current liabilities	397	247
Total current liabilities	6,433	5,056
Commitments and Contingencies
Stockholders' equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized; no shares issued or outstanding
Common stock, $0.01 par value; 20,000,000 shares authorized; 10,435,135 and 10,394,018 shares issued, respectively	104	104
Addtional paid-in capital	25,604	25,578
Retained earnings	13,749	11,671
Accumulated other comprehensive earnings	667	639
Treasury stock, at cost; 33,077 and 33,077 shares, respectively	(204)	(204)
Total stockholders' equity	39,920	37,788
Total liabilities and stockholders' equity	$ 46,353	$ 42,844