Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 11,363	$ 7,945
Trade accounts receivable (net of allowance for doubtful accounts of $49 and $84 in 2014 and 2013, respectively)	3,266	2,844
Inventories, net	12,112	11,575
Deferred tax assets	3,743	3,836
Prepaid expenses and other current assets	1,921	1,920
Total current assets	32,405	28,120
Property, plant and equipment, net	1,282	1,045
Deferred tax assets, net	2,290	3,072
Capitalized software, net	753	1,478
Other assets	256	308
Total assets	36,986	34,023
Current liabilities:
Accounts payable	1,403	950
Accrued compensation and related taxes	1,246	779
Accrued warranty expense	384	292
Accrued other expenses and other current liabilities	217	154
Deferred revenue	291	281
Total current liabilities	3,541	2,456
Deferred revenue	212	147
Total liabilities	3,753	2,603
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: 13,665,087 and 13,588,804 issued and outstanding shares at December 31, 2014 and 2013, respectively	8,199	8,153
Additional paid-in capital	24,816	24,672
Accumulated earnings (deficit)	218	(1,405)
Total stockholders' equity	33,233	31,420
Total liabilities and stockholders' equity	$ 36,986	$ 34,023