Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 7,490	$ 10,910
Available-for-sale-securities	2,103	0
Trade accounts receivable, net	5,313	3,448
Inventories, net	14,793	13,999
Prepaid expenses and other current assets	884	1,410
Total current assets	30,583	29,767
Property, plant and equipment, net	2,427	2,486
Available-for-sale securities	7,942	6,472
Deferred tax assets, net	1,943	3,418
Other assets	356	401
Total assets	43,251	42,544
Current liabilities:
Accounts payable	2,872	1,973
Accrued compensation and related taxes	1,355	2,193
Accrued warranty expense	1,060	650
Accrued other expenses and other current liabilities	372	169
Dividends payable	275	1,235
Deferred revenue	147	142
Total current liabilities	6,081	6,362
Deferred revenue	397	408
Total liabilities	6,478	6,770
Commitments and contingencies
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; 13,844,584 and13,754,749 issued and outstanding shares at June 30, 2017 and December 31, 2016, respectively	8,307	8,253
Additional paid-in capital	25,533	25,382
Accumulated (deficit) earnings	(1,227)	240
Accumulated other comprehensive income	4,539	2,061
Treasury stock, at cost, 76,722 and 30,422 at June 30, 2017 and December 31, 2016, respectively	(379)	(162)
Total stockholders' equity	36,773	35,774
Total liabilities and stockholders' equity	$ 43,251	$ 42,544