CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 3,756	$ 5,507
Accounts receivable, net	10,200	10,948
Inventories	11,382	8,875
Prepaid income taxes	286	514
Other current assets	424	517
Total current assets	26,048	26,361
Fixed assets, net of accumulated depreciation of $18,991 and $18,336, respectively	2,451	2,169
Goodwill	2,621	2,621
Deferred tax assets	2,285	2,308
Intangible assets, net of accumulated amortization of $3,024, and $2,779, respectively	411	458
Other assets	31	33
Total noncurrent assets	7,799	7,589
Total assets	33,847	33,950
Current liabilities:
Accounts payable	5,202	3,841
Accrued liabilities	3,040	3,339
Deferred revenue	243	169
Total current liabilities	8,485	7,349
Deferred revenue, net of current portion	94	69
Deferred rent, net of current portion	269	271
Other liabilities	262	247
Total noncurrent liabilities	625	587
Total liabilities	9,110	7,936
Shareholders' equity:
Common stock, $0.01 par value, 20,000,000 shares authorized; 11,185,331 and 11,170,881 shares issued, respectively; 7,383,364 and 7,782,292 shares outstanding, respectively	114	114
Additional paid-in capital	31,533	31,353
Retained earnings	25,310	24,756
Treasury stock, 3,851,967 and 3,388,589 shares, at cost	(110)	(99)
Treasury stock, at cost, 3,801,967 and 3,388,589 shares, respectively	(32,110)	(30,110)
Total shareholders' equity	24,737	26,014
Total liabilities and shareholders' equity	$ 33,847	$ 33,950