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Note 3 - Basis of Presentation and Significant Accounting Policies - Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available-for-sale Securities	$ 1,653	$ 1,036
Avalanche International Corp. [Member]
Available-for-sale Securities	1,561	952
Fair Value, Measurements, Recurring [Member] \| Avalanche International Corp. [Member]
Available-for-sale Securities	1,653	1,036
Fair Value, Measurements, Recurring [Member] \| Avalanche International Corp. [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale Securities	92	84
Fair Value, Measurements, Recurring [Member] \| Avalanche International Corp. [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale Securities	1,561	952
Fair Value, Measurements, Recurring [Member] \| Avalanche International Corp. [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale Securities
Fair Value, Measurements, Recurring [Member] \| Other Companies [Member]
Available-for-sale Securities	20
Fair Value, Measurements, Recurring [Member] \| Other Companies [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale Securities	20
Fair Value, Measurements, Recurring [Member] \| Other Companies [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale Securities
Fair Value, Measurements, Recurring [Member] \| Other Companies [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale Securities