Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 9,637	$ 12,646
Trade accounts receivable, net of allowance of $140 and $135, respectively	11,993	10,833
Inventories, net of allowance of $996 and $946, respectively	11,906	13,892
Contract assets	1,196	2,299
Prepaid expenses and other	1,691	1,606
Total current assets	36,423	41,276
Property and equipment, less accumulated depreciation of $4,430 and $4,155, respectively	11,318	11,242
Goodwill	17,820	17,641
Other intangible assets, less accumulated amortization of $12,681 and $11,900, respectively	15,608	15,568
Note receivable, less current portion	305	317
Restricted cash	523
Deposits and other assets	1,928	1,865
Total assets	83,925	87,909
Current Liabilities:
Accounts payable	4,494	5,110
Short-term overdraft facility	837
Mortgage note payable, current portion	95	94
Accrued expenses	3,609	4,186
Contract liabilities	5,168	8,829
Refund liabilities	1,951	695
Total current liabilities	16,154	18,914
Long term mortgage note payable, less current portion	3,231	3,256
Acquisition Note Payable - related party (2)	5,304	5,304
Derivative liability	272	356
Deferred tax liabilities	1,999	2,414
Other long-term liabilities	190	179
Total liabilities	27,150	30,423
Commitments and contingencies
Stockholders' Equity
Preferred stock, par value $0.001; 10,000,000 shares authorized; no shares issued at March 31, 2018 or December 31, 2017
Common stock, par value $0.001; 325,000,000 shares authorized; 28,485,898 shares issued and outstanding at March 31, 2018 and 28,406,856 shares issued and outstanding at December 31, 2017	28	28
Additional paid-in capital	169,747	169,527
Accumulated deficit	(109,929)	(108,559)
Accumulated other comprehensive loss	(3,071)	(3,510)
Total stockholders' equity	56,775	57,486
Total liabilities and stockholders' equity	$ 83,925	$ 87,909