Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 3,062	$ 753
Adjustments to reconcile net income to operating cash flow:
Depreciation and amortization	1,617	1,553
Loss on sale of investments, net	27	22
Impairment of investments		180
Deferred income taxes		(352)
Stock based compensation	42
Loss / (Gain) on sale of property and equipment	151	(243)
(Increase) decrease in operating assets:
Accounts receivable	(502)	(167)
Inventories	(1,649)	(476)
Refundable income taxes	(70)	399
Prepaid expenses and other current assets	(448)	244
Increase (decrease) in operating liabilities:
Accounts payable	(1,710)	138
Accrued expenses	765	2,637
Income taxes payable	576	15
Net cash (used in) provided by operating activities	1,861	4,703
Cash flows from investing activities:
Purchases of investments	(479)	(1,287)
Proceeds from sale of investments	1,024	1,134
Redemption of certificates of deposit	513	100
Investments in certificates of deposit		(385)
Purchases of property and equipment	(1,382)	(1,377)
Proceeds from sale of equipment	39	342
Net cash used in investing activities	(285)	(1,473)
Cash flows from financing activities:
Purchase of treasury stock	(738)
Repayment of notes payable	(420)	(617)
Net cash used in financing activities	(1,158)	(617)
Net increase in cash and cash equivalents	418	2,613
Cash and cash equivalents at the beginning of the period	5,646
Cash and cash equivalents at the end of the period	6,064
Supplemental cash flow information:
Cash paid for income taxes, net of refunds	886	883
Cash paid for interest	$ 105	$ 124