Shareholders' Equity - Additional Information (Detail)	Apr. 22, 2013	Mar. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Common stock, shares authorized		75,000,000	75,000,000
Common stock, shares issued		12,762,452	12,762,452
Common stock, shares outstanding		12,754,045	12,754,045
Common stock, future issuance	416,964
Preferred stock, shares authorized		2,500,000	2,500,000
Preferred stock, shares issued