Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 6,345	$ 4,669
Trade accounts receivable, net	7,249	4,122
Inventories, net	17,024	16,282
Prepaid expenses and other current assets	3,145	3,081
Total current assets	33,763	28,154
Property, plant and equipment, net	2,134	1,840
Available-for-sale securities	4,338	3,402
Deferred tax assets, net	5,044	5,461
Capitalized software, net	317	370
Other assets	213	222
Total assets	45,809	39,449
Current liabilities:
Accounts payable	4,145	2,285
Accrued compensation and related taxes	1,335	1,136
Accrued warranty expense	518	538
Customer deposits	3,507	0
Accrued other expenses and other current liabilities	188	168
Deferred revenue	139	136
Total current liabilities	9,832	4,263
Deferred revenue	339	366
Total liabilities	$ 10,171	$ 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; 13,730,562 issued and outstanding shares	$ 8,238	$ 8,238
Additional paid-in capital	24,938	24,926
Retained earnings	1,772	1,259
Accumulated other comprehensive income	690	397
Total stockholders' equity	35,638	34,820
Total liabilities and stockholders' equity	$ 45,809	$ 39,449