Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 8,042	$ 7,945
Trade accounts receivable (net of allowance for doubtful accounts of $84 at March 31, 2014 and December 31, 2013, respectively)	5,539	2,844
Inventories, net	10,865	11,575
Deferred tax assets	3,617	3,836
Prepaid expenses and other current assets	1,552	1,920
Total current assets	29,615	28,120
Property, plant and equipment, net	1,082	1,045
Deferred tax assets, net	3,165	3,072
Capitalized software, net	1,281	1,478
Other assets	298	308
Total assets	35,441	34,023
Current liabilities:
Accounts payable	1,690	950
Accrued compensation and related taxes	922	779
Accrued warranty expense	313	292
Accrued other expenses and other current liabilities	109	154
Deferred revenue	251	281
Total current liabilities	3,285	2,456
Deferred revenue	151	147
Total liabilities	3,436	2,603
Commitments and contingencies
Stockholders' equity:
Preferred stock; $1.00 par value; 1,000,000 authorized shares none issued or outstanding.	0	0
Common stock; $.60 par value; 20,000,000 authorized shares: 13,636,022 and 13,588,804 issued and outstanding shares at March 31, 2014 and December 31, 2013, respectively	8,181	8,153
Additional paid-in capital	24,754	24,672
Accumulated deficit	(930)	(1,405)
Total stockholders' equity	32,005	31,420
Total liabilities and stockholders' equity	$ 35,441	$ 34,023