Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net income	$ 1,878	$ 617
Adjustments to reconcile net income to net cash provided by operating activities:
Inventories reserve	64	(41)
Deferred tax expense	610	248
Depreciation and amortization	456	443
Share-based compensation expense	26	16
Realized tax benefit from stock option exercise	380	0
Changes in operating assets and liabilities:
Accounts receivable	(1,794)	(118)
Inventories	320	(186)
Prepaid expenses and other current assets	1,175	(615)
Other assets	17	11
Accounts payable	2,275	487
Accrued compensation and related taxes	676	(309)
Accrued warranty expense	(20)	78
Deferred revenue	(16)	(14)
Customer deposits	989	0
Accrued other expenses and other current liabilities	66	(36)
Net cash provided by operating activities	7,102	581
Investing activities
Purchases of property, plant and equipment	(962)	(342)
Investment in securities	(481)	0
Net cash used in investing activities	(1,443)	(342)
Financing activities
Cash dividends paid	(1,236)	0
Repurchase of common stock	(22)	0
Proceeds from issuance of common stock	10	76
Cash (used in) provided by financing activities	(1,248)	76
Net change in cash and cash equivalents	4,411	315
Cash and cash equivalents, beginning of period	4,669	11,363
Cash and cash equivalents, end of period	9,080	11,678
Supplemental disclosure
Cash paid for interest	0	0
Income tax paid	0	25
Non-cash financing activity
Cashless exercise of stock options and related conversion of net shares to stockholders' equity	$ 4	$ 15