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Note 3 - Summary of Significant Accounting Policies - Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Available-for-sale Securities	$ 1,036	$ 90
Avalanche International Corp. [Member]
Available-for-sale Securities	952
Avalanche International Corp. [Member] \| Fair Value, Measurements, Recurring [Member]
Available-for-sale Securities	1,036
Avalanche International Corp. [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale Securities	84
Avalanche International Corp. [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale Securities	952
Avalanche International Corp. [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale Securities
Telkoor [Member]
Available-for-sale Securities		90	$ 207
Telkoor [Member] \| Fair Value, Measurements, Recurring [Member]
Available-for-sale Securities		90
Telkoor [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Available-for-sale Securities
Telkoor [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Available-for-sale Securities
Telkoor [Member] \| Fair Value, Measurements, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Available-for-sale Securities		$ 90