Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 10,910	$ 4,669
Trade accounts receivable (net of allowance for doubtful accounts of $50 and $49 in 2016 and 2015, respectively)	3,448	4,122
Inventories, net	13,999	16,282
Prepaid expenses and other current assets	1,410	3,081
Total current assets	29,767	28,154
Property, plant and equipment, net	2,486	1,840
Available-for-sale securities	6,472	3,402
Deferred tax assets, net	3,418	5,461
Capitalized software, net	176	370
Other assets	225	222
Total assets	42,544	39,449
Current liabilities:
Accounts payable	1,973	2,285
Accrued compensation and related taxes	2,193	1,136
Accrued warranty expense	650	538
Accrued other expenses and other current liabilities	169	168
Dividends payable	1,235	0
Deferred revenue	142	136
Total current liabilities	6,362	4,263
Deferred revenue	408	366
Total liabilities	6,770	4,629
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:13,754,749 and 13,730,562 issued and outstanding shares atDecember 31, 2016 and 2015, respectively	8,253	8,238
Additional paid-in capital	25,382	24,926
Retained earnings	240	1,259
Accumulated other comprehensive income	2,061	397
Treasury stock, at cost, 30,422 shares	(162)	0
Total stockholders' equity	35,774	34,820
Total liabilities and stockholders' equity	$ 42,544	$ 39,449