XML 108 R62.htm IDEA: XBRL DOCUMENT v2.4.0.8
Common Stock - Additional Information (Detail) (USD $)
 6 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 42 Months Ended 1 Months Ended 6 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2013
Mar. 31, 2013
Series A Warrants [Member]
Jun. 30, 2013
Institutional Investors [Member]
Jun. 30, 2013
Institutional Investors [Member]
Common Stock [Member]
Jun. 30, 2009
2009 Sales Agreement [Member]
Nov. 30, 2012
2009 Sales Agreement [Member]
Dec. 31, 2012
2012 Amended Sales Agreement [Member]
Jun. 30, 2013
2012 Amended Sales Agreement [Member]
Jun. 30, 2013
2012 Amended Sales Agreement [Member]
Common Stock [Member]
Mar. 31, 2013
December 2011 Financing [Member]
Series A Warrants [Member]
Dec. 31, 2011
December 2011 Financing [Member]
Series A Warrants [Member]
Mar. 31, 2013
December 2011 Financing [Member]
Common Stock [Member]
Dec. 31, 2012
December 2011 Financing [Member]
Common Stock [Member]
Subsidiary, Sale of Stock [Line Items]                          
Shares available to sale     $ 30,000,000   $ 30,000,000   $ 30,000,000            
Gross proceeds from common stock 4,911,627   3,000,000     26,700,000   4,911,627          
Percentage of compensation paid to sales agent               3.00%          
Common stock, sold       1,645,639         1,021,074        
Sale of stock, price per share       $ 1.823         $ 2.02        
Number of warrants exercised                   334,534      
Number of shares issued upon warrants exercise       329,131               334,534 2,700,000
Proceeds from sale of stock   468,000               468,000 468,000    
Exercise period of rights     3 years                    
Additional amounts of common stock to sell     $ 27,000,000