Public offering ( Details) (USD $)	Mar. 21, 2014	Mar. 11, 2014	Jan. 15, 2014
Public offering Details
Public offering of common stock shares		3,902,440	10,000,000
Number of warrants to purchase shares			4,000,000
Price per one share of common stock			$ 3.00
Portion of warrants in the share and warrant combination			$ 0.40
Fixed combination for gross proceeds in millions			30.0
The warrants have an exercise price			$ 4.00
Net proceeds, after underwriting discounts and commissions and other estimated fees expenses in millions			28.00
The shares were sold per share value		$ 5.74
Gross proceeds of the company in millions		22.4
Discounts and commissions and other estimated fees and expenses were approximately in millions		21.5
Received an additional amount from the exercise of previously issued common stock warrants in millions	18.2