Note 3 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2015

Dec. 31, 2014

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

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

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

	Fair value measurement using inputs				Carrying amount
	Level 1	Level 2	Level 3		March 31, 2015		December 31, 2014 (a)
Financial instruments:
Series 2023 PIK Note Derivative			$	554,128	$	554,128	$	478,149
Series A PIK Note Derivative			$	9,600,625	$	9,600,625	$	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 loss		92,741
Balance at March 31, 2015	$	10,154,753

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
	March 31, 2015			December 31, 2014
Market price and estimated fair value of stock	$	0.70		$	0.73
Exercise price	$	1.36		$	1.36
Term (years)		8.33			8.58
Dividend yield	$	--		$	--
Expected volatility		60.9	%		52.0	%
Risk-free interest rate		1.81	%		2.08	%

Series A PIK Note derivative liability	Fair Value Measurements
	Using Inputs
	March 31, 2015			December 31, 2014
Market price and estimated fair value of stock	$	0.70		$	0.73
Exercise price	$	0.92		$	0.92
Term (years)		3.58			3.83
Dividend yield	$	--		$	--
Expected volatility		60.9	%		52.0	%
Risk-free interest rate		1.81	%		2.08	%

Series 2023 PIK Note derivative liability	Fair Value Measurements
	Using Inputs
	December 31, 2014			December 31, 2013
Market price and estimated fair value of stock	$	0.73		$	1.10
Exercise price	$	1.36		$	1.40
Term (years)		8.58			9.58
Dividend yield	$	--		$	--
Expected volatility *		52.0	%		76.9	%
Risk-free interest rate		2.08	%		2.96	%

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

Warrant derivative liability	Fair Value Measurements
	Using Inputs
	December 31, 2013
Market price and estimated fair value of stock	$	1.10
Exercise price	$	1.93
Term (years)		3
Dividend yield	$	--
Expected volatility *		76.9	%
Risk-free interest rate		0.78	%