CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash Flows from Operating Activities
Net income	$ 6,931	$ 2,676
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property and equipment	2,388	2,597
Amortization of intangible assets	288	218
Provision for bad debt	711	193
Deferred income taxes	573	(338)
Stock compensation expense	77	115
Tax (benefit) on exercise of stock options	(17)	0
(Gain) loss on sale or disposal of property and equipment	(1,318)	32
(Gain) on sale of marketable securities	(7)	(7)
Pension plan adjustment	4	0
Change in operating assets and liabilities:
Accounts receivable	(1,097)	(2,352)
Inventories	(1,613)	(445)
Prepaid expenses and other current assets	(805)	358
Non-current other assets	124	215
Accounts payable	1,273	(109)
Accrued liabilities	2,709	573
Customer deposits and deferred revenue	(116)	1,588
Income taxes payable	481	92
Net cash provided by operating activities	10,586	5,406
Cash Flows from Investing Activities
Purchases of marketable securities	(8,209)	(10,476)
Proceeds from sale of marketable securities	7,935	12,073
Purchase of business assets	0	(20,016)
Purchase of intangible assets	0	(25)
Proceeds from sale of property and equipment	3,795	29
Capital expenditures	(4,264)	(2,008)
Net cash used in investing activities	(743)	(20,423)
Cash Flows from Financing Activities
Cash (paid) received for demand line of credit	(10,000)	10,000
Proceeds from debt obligation	10,000	0
Principal payments on long-term debt	(655)	0
Proceeds from exercise of stock options	87	0
Net cash (used in) provided by financing activities	(568)	10,000
Effect of exchange rate changes on cash	(456)	(506)
Net increase (decrease) in cash and cash equivalents	8,819	(5,523)
Cash and cash equivalents, beginning of period	8,969	14,492
Cash and cash equivalents, end of period	17,788	8,969
Supplemental disclosures of cash flow information:
Cash paid for interest	125	127
Cash paid (refund received) for income taxes	1,409	(759)
Supplemental disclosure of non-cash investing and financing activities
Property, plant and equipment acquired through accounts payable	$ 240	$ 0