Note 4 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

Property, Plant and Equipment [Table Text Block]

	Estimated Useful Life (years)
Building and Building Improvements	5 – 40
Mining equipment	2 – 7
Office and shop furniture and equipment	3 – 7
Vehicles	5

Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]

	Fair value measurement using inputs				Carrying amount
	Level 1	Level 2	Level 3		June 30, 2015		December 31, 2014 (a)
Financial instruments:
Series 2023 PIK Note Derivative			$	482,627	$	482,627	$	478,149
Series A PIK Note Derivative			$	8,359,016	$	8,359,016	$	9,557,476

Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

Balance at December 31, 2014	$	10,035,625
Issuance of additional Series 2023 PIK Note		26,387
Net unrealized gain		(1,220,369	)
Balance at June 30, 2015	$	8,841,643

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]

Series 2023 PIK Note derivative liability	Fair Value Measurements
	Using Inputs
	June 30, 2015			December 31, 2014
Market price and estimated fair value of stock	$	0.58		$	0.73
Exercise price	$	1.36		$	1.36
Term (years)		8.08			8.58
Dividend yield	$	--		$	--
Expected volatility		62.2	%		52.0	%
Risk-free interest rate		2.17	%		2.08	%

Series A PIK Note derivative liability	Fair Value Measurements
	Using Inputs
	June 30, 2015			December 31, 2014
Market price and estimated fair value of stock	$	0.58		$	0.73
Exercise price	$	0.92		$	0.92
Term (years)		3.17			3.83
Dividend yield	$	--		$	--
Expected volatility		62.2	%		52.0	%
Risk-free interest rate		2.17	%		2.08	%