Note Payable - General Electric Capital Corporation (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	$ 6.8
General Electric Capital Corporation [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Amount Outstanding During Period	10
Line of Credit Facility, Current Borrowing Capacity	10
Line of Credit Facility, Interest Rate Description	Borrowings under the Credit Agreement may be made as prime rate loans with an applicable margin of 3.0% per annum or 1, 2, 3 or 6 month LIBOR loans with an applicable margin of 4.0% per annum.
Availability of Credit, Percentage on Book Value	85.00%
Long-term Line of Credit	3.2
Line of Credit Facility, Remaining Borrowing Capacity	6.8
Line of Credit Facility, Interest Rate During Period	4.20%
Line of Credit Facility, Expected Maximum Borrowing Capacity	$ 15