Note 4 - Fair Values of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2017

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

	March 31, 2017						December 31, 2016
	Carrying Amount			Fair Value			Carrying Amount			Fair Value
Financial Assets:
Cash	$	13,968,046		$	13,968,046		$	5,196,914		$	5,196,914
Accounts Receivable		1,573,996			1,573,996			914,741			914,741
Short-term investments
U. S. agency securities		43,735,095			43,802,259			45,289,747			45,245,318
Certificates of deposit		15,917,476			15,939,782			9,948,000			9,948,000
Total		59,652,571			59,742,041			55,237,747			55,193,318
Long-term investments
U. S. agency securities		5,199,278			5,191,073			5,199,077			5,190,640
Financial liabilities:
Accounts payable		(10,117,174	)		(10,117,174	)		(8,955,884	)		(8,955,884	)
Note payable		-			-			(500,000	)		(500,000	)
Note payable - Ramaco Carbon LLC		-			-			(10,629,275	)		(10,629,275	)