Stock Warrants (Details) - Warrant [Member]	3 Months Ended
	Mar. 31, 2015 $ / shares shares
Beginning balance (in shares) | shares	84,000
Beginning balance (in dollars per share) | $ / shares	$ 1.21
Changes during the period:
Stock warrants granted (in shares) | shares	0
Stock warrants granted (in dollars per share) | $ / shares	$ 0
Stock warrants expired (in shares) | shares	0
Stock warrants expired (in dollars per share) | $ / shares	$ 0
Stock warrants exercised (in shares) | shares	0
Stock warrants exercised (in dollars per share) | $ / shares	$ 1.21
Ending balance (in shares) | shares	84,000
Ending balance (in dollars per share) | $ / shares	$ 1.21