Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 7,856	$ 11,363
Trade accounts receivable (net of allowance for doubtful accounts of $49 at September 30, 2015 and December 31, 2014, respectively)	4,216	3,266
Inventories, net	13,834	12,112
Deferred tax assets	3,310	3,743
Prepaid expenses and other current assets	2,569	1,921
Total current assets	31,785	32,405
Property, plant and equipment, net	1,771	1,282
Available-for-sale securities, at fair value	3,893	0
Deferred tax assets, net	1,937	2,290
Capitalized software, net	445	753
Other assets	234	256
Total assets	40,065	36,986
Current liabilities:
Accounts payable	2,602	1,403
Accrued compensation and related taxes	1,381	1,246
Accrued warranty expense	517	384
Accrued other expenses and other current liabilities	191	217
Deferred revenue	132	291
Total current liabilities	4,823	3,541
Deferred revenue	371	212
Total liabilities	5,194	3,753
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: 13,718,396 and 13,665,087 issued and outstanding shares at September 30, 2015 and December 31, 2014, respectively	8,231	8,199
Additional paid-in capital	24,893	24,816
Retained earnings	1,047	218
Accumulated other comprehensive income	700	0
Total stockholders' equity	34,871	33,233
Total liabilities and stockholders' equity	$ 40,065	$ 36,986