|
Subsequent events (Details Textual) (Subsequent Event [Member], USD $)
|
3 Months Ended | 1 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
|
Mar. 31, 2013
|
Apr. 01, 2013
Independent Directors [Member]
|
Apr. 01, 2013
Executive Chairman [Member]
|
Apr. 01, 2013
Audit Committee Members [Member]
|
Apr. 01, 2013
Audit Committee Chairman [Member]
|
Apr. 01, 2013
Compensation Committee Members [Member]
|
Apr. 01, 2013
Nominating & Governance Committee Members [Member]
|
Apr. 01, 2013
Nominating & Governance Committee Chairman [Member]
|
|
| Subsequent Events (Textual) [Abstract] | ||||||||
| Annual Board retainer fee | $ 50,000 | $ 100,000 | ||||||
| Annual Audit Committee retainer fee | 10,000 | 15,000 | ||||||
| Annual Compensation Committee retainer fee | 10,000 | 6,667 | ||||||
| Annual Nominating & Governance Committee retainer fee | $ 3,334 | $ 5,000 | ||||||
| Annual grant options to purchase shares of the Company's common stock | 25,000 | 60,000 | ||||||
| Exercise price as percentage of the average closing price of the Company's common stock | 110.00% | |||||||
| Number of trading days for common stock listed/quoted | 5 days | |||||||
| Options vest period | 12 months | |||||||