Note 11 - Fair Value Measurements (Details Textual) - Warrant [Member] - USD ($) |
Jun. 30, 2017 |
Jun. 30, 2016 |
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| Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | $ 24,000 | |
| Fair Value, Inputs, Level 3 [Member] | ||
| Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value | $ 0 | $ 24,000 |
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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