Note 20 - Income Taxes (Details) - Deferred Income Taxes (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred income tax assets:
Net operating loss carry forwards	$ 31,785	$ 25,458
Temporary differences due to accrued warranty costs	706	684
Temporary differences due to bonus and vacation accrual	16	33
Employment turnover	666
Investment in subsidiaries	3,257
Credits	16	16
Allowance for bad debts	1,196	2,474
Fair value adjustment arising from subsidiaries acquisition	358
Other temporary differences	1,041us-gaap_DeferredTaxAssetsOther	595us-gaap_DeferredTaxAssetsOther
	39,041us-gaap_DeferredTaxAssetsGross	29,260us-gaap_DeferredTaxAssetsGross
Valuation allowance	(38,017)	(29,260)
Total deferred income tax assets	1,024us-gaap_DeferredTaxAssetsNet
Deferred income tax liabilities:
Fair value adjustment arising from subsidiaries acquisition	3,680
Total deferred income tax liabilities	3,680us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax liabilities	$ 2,656us-gaap_DeferredTaxAssetsLiabilitiesNet

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