Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 793	$ 3,979
Trade accounts receivable, net of allowance of $273 and $167, respectively	13,270	14,416
Inventories, net of allowance of $2,652 and $2,495, respectively	11,342	13,042
Contract assets	2,618	1,744
Note receivable, current portion	309	318
Prepaid expenses and other current assets	1,867	1,982
Total current assets	30,199	35,481
Property and equipment, less accumulated depreciation of $4,130 and $4,234, respectively	5,201	5,973
Right of use assets - operating leases	7,422
Goodwill	13,089	13,089
Other intangibles assets, net	13,476	13,861
Restricted cash	523	523
Convertible notes receivable		655
Investment - equity method	5,278
Deposits and other assets	573	585
Total assets	75,761	70,167
Current Liabilities:
Accounts payable	6,192	6,480
Short-term overdraft facility		1,344
Line of credit		979
Operating lease obligations - current portion	975
Accrued expenses	5,590	4,851
Current contract liabilities	2,453	2,226
Refund liabilities	2,594	2,417
Deferred gain on leaseback, current portion		289
Total current liabilities	17,804	18,586
Long term note payable, related party	5,304	5,304
Operating lease obligations, less current portion	6,589
Deferred tax liabilities	1,922	1,922
Deferred gain on leaseback, less current portion		2,599
Other long-term liabilities	162	218
Total liabilities	34,206	28,629
Commitments and contingencies
Stockholders' Equity:
Preferred stock, par value $0.001; 10,000,000 shares authorized; no shares issued at March 31, 2019 or December 31, 2018
Common stock, par value $0.001; 325,000,000 shares authorized; 28,581,953 shares issued and outstanding at March 31, 2019 and 28,552,886 shares issued and outstanding at December 31, 2018	29	29
Additional paid-in capital	169,938	169,898
Accumulated deficit	(124,108)	(123,993)
Accumulated other comprehensive loss	(4,304)	(4,396)
Total stockholders' equity	41,555	41,538
Total liabilities and stockholders' equity	75,761	70,167
Previously Reported [Member] | Accounting Standards Update 2014-09 [Member]
Stockholders' Equity:
Total stockholders' equity		41,538
Multi-currency Variable Rate Overdraft Facility [Member]
Current Liabilities:
Line of credit facility	965
Revolving Credit Facility [Member]
Current Liabilities:
Line of credit facility	$ 1,460