Subsequent Events - Additional Information (Detail) (USD $)	3 Months Ended				12 Months Ended			12 Months Ended	1 Months Ended			1 Months Ended	0 Months Ended	12 Months Ended	1 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2011	May 24, 2012	Dec. 31, 2013 Preferred Stock Purchase Rights Under Stockholder Rights Plan Initial Minimum	Feb. 28, 2014 Subsequent Event	Mar. 04, 2014 Subsequent Event	Jan. 17, 2014 Subsequent Event	Feb. 28, 2014 Subsequent Event Stock Dividends	Mar. 04, 2014 Subsequent Event Comerica Bank	Dec. 31, 2013 Subsequent Event Preferred Stock Purchase Rights Under Stockholder Rights Plan Minimum	Feb. 10, 2014 Subsequent Event February 2014 Subscription Agreement	Dec. 19, 2013 Oracle Group	Sep. 23, 2013 Oracle Group	Dec. 31, 2013 Oracle Group
Subsequent Event [Line Items]
Single person ownership percentage that triggers preferred stock rights								15.00%						20.00%
Issuance of stock, net, shares															1,945,525		340,000
Common stock issued, price per share															$ 2.57	$ 1.80
Proceeds from equity offering, gross															$ 5,000,000	$ 612,000
Proceeds from equity offering, net of expenses					5,201,000	17,223,000									4,800,000	578,000
Cost associated with transaction															208,000	34,000
Maximum stock offering price											12,500,000
Lines of credit maximum borrowing capacity							8,000,000			5,000,000
Credit Agreements amendment fee													$ 10,000
Stock dividend policy adopted									2.00%
Special stock dividends declared	0.50%	0.50%	0.50%	0.50%								0.50%
Dividends declared, date of record												Mar. 14, 2014
Dividend payable date												Mar. 28, 2014
Oracle Partners L.P.'s Ownership Percentage																		16.00%