Stock-Based Compensation Plans - Additional Information (Detail) (USD $)	6 Months Ended		12 Months Ended						6 Months Ended	12 Months Ended			6 Months Ended	12 Months Ended			6 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012 Employee	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2012 Executive Officer One [Member]	Dec. 31, 2012 Executive Officer Two [Member]	Dec. 31, 2011 Stock Options [Member]	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Jun. 30, 2011 Stock Options [Member]	Dec. 31, 2011 Restricted Stock [Member]	Dec. 31, 2013 Restricted Stock [Member]	Dec. 31, 2012 Restricted Stock [Member]	Jun. 30, 2011 Restricted Stock [Member]	Dec. 31, 2011 Employee Stock Purchase Plan [Member]	Dec. 31, 2013 Employee Stock Purchase Plan [Member]	Dec. 31, 2012 Employee Stock Purchase Plan [Member]	Jun. 30, 2011 Employee Stock Purchase Plan [Member]	Jun. 30, 2013 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining available shares for issuance under the plan			6,140,307
Stock Option Awards expiry range			5 years							10 years
Vest in designated installments over			4 years							5 years
Stock Option Awards to purchase shares of the company's common stock				2
Stock Option Awards granted				825,000			750,000	75,000	0	0	0	0
Exercise price per share				$ 1.45
Vesting percent of shares							40.00%	20.00%
Remainder vesting in equal installments							3 years	4 years
Stock Option Awards expiration date				Jan. 31, 2017
Compensation expense related to Stock Option				$ 500,000
Compensation expense related to Stock Option amortized				300,000
Remaining Compensation expense amortized through January 2016				200,000
Fair value of Stock Option Awards with expected volatility				73.00%
Risk-free interest rate				0.71%
Dividend yield rate				0.00%
Expected term				5 years
Value of options granted per share				$ 0.63
Risk-free interest rate, duration				5 years
Weighted average remaining contractual life of options outstanding			4 years 2 months 12 days
Exercisable/vested			4 years 1 month 6 days
Number of shares vested			71,286
Restricted Stock Awards granted													0	0	0	0
Aggregate fair values of Restricted Stock Awards vested													44,000	100,000	100,000	800,000
Expected amortization period			Through November 2014
Expected future compensation expense related to issuance of Restricted Stock Awards			51,000
Percentage of authorize payroll deductions																		15.00%			15.00%
Maximum Amount of outstanding stock to be subscribed																		25,000
Company reserved shares of common stock for issuance under the ESPP																		400,000
Employees purchase shares																	18,000	35,000	40,000	32,000
Compensation expense to purchase shares under the ESPP	$ 171,000	$ 365,000	$ 243,000	$ 604,000	$ 804,000	$ 998,000											$ 2,000	$ 7,000	$ 11,000	$ 8,000
Shares remain available for issuance under the ESPP																		118,269