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Stockholders' Equity (Detail Textuals 1) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended		0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Apr. 03, 2014
Equity Offering [Line Items]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Proceed from public offering	$ 9,289	$ 19,006
Common stock
Equity Offering [Line Items]
Number of common shares sold into underwriting agreement (in shares)	2,857,143	6,833,334
Proceed from public offering	3	6
Common stock \| April 2014 Underwriting Agreement
Equity Offering [Line Items]
Number of common shares sold into underwriting agreement (in shares)			2,857,143
Common stock, par value (in dollars per share)			$ 0.001
Share price per share			$ 3.50
Proceed from public offering			$ 9,300