Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (7,266)	$ (5,987)	$ (2,801)
Adjustments to reconcile net (loss) to net cash used in operating activities:
Depreciation	925	854	786
Amortization of intangibles	1,923	2,355	3,656
Amortization of investment premiums and discounts	0	15	75
Non-cash Royalties, net (see Note 2 - Investment and note receivable)	19	0	0
Stock and options issued for compensation, royalties and services	734	1,267	1,686
Unrealized (Gain) loss on derivative	(113)	(20)	172
Non-cash earnings on equity method investment	0	(53)	(49)
Provision for (credit to) bad debt expense and returns allowances	93	192	(91)
Deferred income taxes	(107)	(534)	(674)
Impairment of intangible assets	0	4	32
Inventory reserve	312	94	(148)
Loss on disposal of assets	57	54	26
Other, net	0	(5)	0
(Increase) decrease in operating assets:
Trade accounts receivable	4,432	(3,323)	(1,378)
Inventories	(1,672)	(3,708)	210
Costs in excess of billings	(1,454)	(1,612)	(1,347)
Prepaid expenses and other current assets	105	(856)	(971)
Deposits and other assets	(25)	68	19
Increase (decrease) in operating liabilities:
Accounts payable	495	2,050	(237)
Accrued expenses	(518)	1,847	353
Contingent consideration	(54)	0	0
Unearned revenue	1,179	2,204	505
Billings in excess of costs	162	(1,307)	(2,938)
NET CASH USED IN OPERATING ACTIVITIES	(773)	(6,401)	(3,114)
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisition of a business, net of contingent consideration (Note 4)	0	(4,285)	0
Deposits for property and equipment	0	0	(62)
Purchase of property and equipment	(824)	(5,045)	(953)
Proceeds from sale of property and equipment	27	17	0
Investments in other intangible assets	(850)	(128)	(167)
Purchase of short term investments held to maturity	0	0	(12,767)
Maturities of short term investments held to maturity	0	11,145	12,401
Receipts from deferred property grant	0	425	0
NET CASH (USED IN) PROVIDED BY INVESTING ACTIVITIES	(1,647)	2,129	(1,548)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on capital lease obligations	(41)	(32)	(108)
Payments on notes and loans payable	(85)	(81)	(77)
Payments on contingent consideration	(59)	0	0
NET CASH (USED IN) FINANCING ACTIVITIES	(185)	(113)	(185)
Effect of exchange rate changes on cash	(45)	(52)	(25)
Net decrease in cash and cash equivalents	(2,650)	(4,437)	(4,872)
Cash and cash equivalents at beginning of year	7,267	11,704	16,576
CASH AND CASH EQUIVALENTS AT END OF YEAR	4,617	7,267	11,704
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Income taxes paid	211	44	374
Interest paid, net of capitalized interest	469	440	509
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Common stock issued and issuable for royalties payable pursuant to product agreements, related party	38	22	13
Contingent consideration recorded in acquisition	0	216	0
Common stock issued and to be issued for consulting services and compensation in common stock	270	741	1,019
Exchange of investment in TPI in return for note receivable (Note 2)	385	0	0
Accrued property and equipment purchases at December 31	45	99	9
Accrued investment in other intangible assets at December 31	48	50	0
Deposits for property and equipment purchases in accounts payable at December 31	0	0	62
Assets acquired via capital leases	19	0	75
Conversion of accrued liabilities to common stock	$ 0	$ 0	$ 39