Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 8,621	$ 4,669
Trade accounts receivable, net	6,237	4,122
Inventories, net	13,284	16,282
Prepaid expenses and other current assets	1,821	3,081
Total current assets	29,963	28,154
Property, plant and equipment, net	2,629	1,840
Available-for-sale securities	6,472	3,402
Deferred tax assets, net	3,564	5,461
Capitalized software, net	211	370
Other assets	229	222
Total assets	43,068	39,449
Current liabilities:
Accounts payable	2,811	2,285
Accrued compensation and related taxes	1,939	1,136
Accrued warranty expense	586	538
Customer deposits	2	0
Accrued other expenses and other current liabilities	201	168
Deferred revenue	144	136
Total current liabilities	5,683	4,263
Deferred revenue	394	366
Total liabilities	6,077	4,629
Commitments and contingencies
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; 13,754,749 and 13,730,562 issued and outstanding shares at September 30, 2016 and December 31, 2015, respectively	8,253	8,238
Additional paid-in capital	25,376	24,926
Retained earnings	1,384	1,259
Accumulated other comprehensive income	2,061	397
Treasury stock, at cost	(83)	0
Total stockholders' equity	36,991	34,820
Total liabilities and stockholders' equity	$ 43,068	$ 39,449