Commitments and contingencies (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies (Textual) [Abstract]
Extension of employment agreement	12 months
Future Minimum Payments Under Employee Agreements	$ 800,000
Lease expiration amendment period	24 months
Royalties received		300,000
Over Payment of Royalty Costs		1,100,000
Corporate [Member]
Commitments and Contingencies (Textual) [Abstract]
Lease, expiration date	Jan. 01, 2013
Lease expense	100,000	100,000
CDC [Member]
Commitments and Contingencies (Textual) [Abstract]
Royalties received	18,750
Granted royalty on sales of the next BEMA product	1.00%
Royalty repurchase minimum period	6 months
Net sales of Next BEMA Product	7,500,000
CDC [Member] | Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Royalties received	$ 375,000