Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 18,853	$ 19,018
Trade accounts receivable, net of allowance for doubtful accounts of $147 and $147, respectively	5,889	5,748
Inventories	3,803	3,243
Deferred tax assets	643	701
Prepaid expenses and other current assets	325	371
Total current assets	29,513	29,081
Property and equipment:
Machinery and equipment	4,294	4,190
Leasehold improvements	594	594
Gross property and equipment	4,888	4,784
Less: accumulated depreciation	(3,565)	(3,530)
Net property and equipment	1,323	1,254
Deferred tax assets	1,068	1,030
Goodwill	1,706	1,706
Intangible assets, net	1,655	1,748
Restricted certificates of deposit	450	450
Other assets	220	212
Total assets	35,935	35,481
Current liabilities:
Accounts payable	1,561	1,064
Accrued wages and benefits	1,229	1,635
Accrued rent	595	577
Accrued professional fees	329	367
Accrued sales commissions	303	305
Other current liabilities	438	384
Total current liabilities	4,455	4,332
Commitments and Contingencies
Stockholders' equity:
Preferred stock, $0.01 par value; 5,000,000 shares authorized; no shares issued or outstanding	0	0
Common stock, $0.01 par value; 20,000,000 shares authorized; 10,585,755 and 10,590,755 shares issued, respectively	106	106
Addtional paid-in capital	26,228	26,187
Retained earnings	3,999	3,713
Accumulated other comprehensive earnings	1,351	1,347
Treasury stock, at cost; 33,077 and 33,077 shares, respectively	(204)	(204)
Total stockholders' equity	31,480	31,149
Total liabilities and stockholders' equity	35,935	35,481
Common Stock [Member]
Stockholders' equity:
Total stockholders' equity	$ 106	$ 106