Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2017		Jun. 30, 2016
Cash Flows From Operating Activities:
Net income	$ 1,354,000		$ 1,304,000
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense	163,000		34,000
Depreciation and amortization	279,000		271,000
Equity in income of unconsolidated affiliate	(234,000)		(191,000)
Changes in assets and liabilities:
Accounts receivable, net	(299,000)		(2,351,000)
Accounts receivable, unconsolidated affiliate	(104,000)		6,000
Inventories	226,000		3,742,000
Prepaid expenses and other current assets	841,000		150,000
Accounts payable and accrued liabilities	(549,000)		(103,000)
Net cash provided by operating activities	1,677,000		2,862,000
Cash Flows From Investing Activities:
Purchase of property and equipment	(734,000)		(163,000)
Purchase of marketable securities			(41,000)
Net cash used in investing activities	(734,000)		(204,000)
Cash Flows From Financing Activities:
Repurchase of common stock	(1,624,000)		(1,751,000)
Proceeds from exercise of stock options	61,000
Net cash used in financing activities	(1,563,000)		(1,751,000)
Increase (decrease) in cash	(620,000)		907,000
Cash, beginning of the period	9,456,000	[1]	9,681,000
Cash, end of the period	$ 8,836,000		$ 10,588,000

[1] The condensed consolidated balance sheet as of December 31, 2016 has been prepared using information from the audited consolidated balance sheet as of that date.