Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 4,516	$ 6,581
Trade accounts receivable (net of allowance for doubtful accounts of $39 at March 31, 2013 and December 31, 2012, respectively)	4,996	2,062
Inventories, net	13,480	13,345
Deferred tax assets	4,264	4,429
Prepaid expenses and other current assets	678	915
Total current assets	27,934	27,332
Property, plant and equipment, net	1,066	1,113
Deferred tax assets, net	3,069	2,978
Capitalized software, net	2,085	2,207
Other assets	321	330
Total assets	34,475	33,960
Current liabilities:
Accounts payable	1,742	1,132
Accrued compensation and related taxes	1,039	1,485
Accrued warranty expense	284	267
Accrued other expenses and other current liabilities	148	166
Note payable		18
Deferred revenue	537	627
Total current liabilities	3,750	3,695
Deferred revenue	105	81
Total liabilities	3,855	3,776
Stockholders' equity:
Preferred stock; $1.00 par value; 1,000,000 authorized shares none issued or outstanding.
Common stock; $.60 par value; 20,000,000 authorized shares: 13,545,482 issued and outstanding shares at March 31, 2013 and December 31, 2012, respectively	8,127	8,127
Additional paid-in capital	24,635	24,604
Accumulated deficit	(2,142)	(2,547)
Total stockholders' equity	30,620	30,184
Total liabilities and stockholders' equity	$ 34,475	$ 33,960