Commitments - Employment Agreements (Narrative) (Detail) (USD $)	6 Months Ended
	Jun. 30, 2013 Item
Employee severance agreement [Member]
Commitments Disclosure [Line Items]
Number of agreements	1
Employment contract [Member]
Commitments Disclosure [Line Items]
Number of agreements	2
Employment contract [Member] | Chief executive officer [Member]
Commitments Disclosure [Line Items]
Annual salary commitment	$ 587,000
Termination pay commitment rate applied to the average of the prior five calendar years compensation	299.00%
Employment contract [Member] | Senior Vice President of Sales and Marketing [Member]
Commitments Disclosure [Line Items]
Annual salary commitment	$ 274,400
Employment agreement expiration date	2014-10