Common Stock - Additional Information (Detail) (USD $)	0 Months Ended		1 Months Ended	3 Months Ended	165 Months Ended	2 Months Ended	12 Months Ended		0 Months Ended
	Mar. 28, 2012	Mar. 22, 2012	Mar. 23, 2012	Mar. 31, 2014	Mar. 31, 2014	Feb. 28, 2014 At Market Agreement	Dec. 31, 2013 At Market Agreement	Oct. 25, 2013 At Market Agreement	Mar. 22, 2012 Underwriting Agreement	Mar. 28, 2012 Warrant 7	Mar. 22, 2012 Warrant 7
Class of Stock [Line Items]
Units issued	1,333,361								1,159,445
Number of common stock in each units issued									2
Number of warrant in each units issued									1
Number of common stock to be purchased with each warrant									1
Period of option to purchase additional units to cover over-allotments									45 days
Additional units authorize for issuance to cover over-allotments									173,916
Fair market value of common stock per share									$ 9.00
Exercise price of warrant	5.63								5.63
Expiration date of warrant	May 02, 2016								Mar. 28, 2017
Shares of common stock issued	2,666,722					2,663,647	99,942
Warrants to purchase shares of common stock issued	1,333,361
Gross proceeds from issuance of stock and warrants	$ 12,000,000
Net proceeds from issuance of stock and warrants	10,403,000
Warrants issuance value	4,445,000	143,000			9,482,000
Fair value assumptions, warrants exercise price										$ 4.20	$ 4.20
Fair value assumptions, term of warrants										5 years	4 years 1 month 6 days
Fair value assumptions, volatility rate										119.00%	117.00%
Fair value assumptions, risk free interest rate										1.05%	0.78%
Warrants issued in period	46,378
Reverse stock split ratio			0.1667
Aggregate offering price								30,000,000
Commission to sales agent as a percentage of gross proceeds								3.00%
Price of common stock per share							$ 9.02
Gross proceeds from sale of common stock							944,000
Initial legal and accounting costs							82,000
Commissions							29,000
Proceeds from issuance of common stock				$ 28,178,000	$ 71,104,000	$ 28,178,000	$ 833,000