Equity Offerings - Additional Information (Detail) (USD $)	0 Months Ended		1 Months Ended			12 Months Ended				1 Months Ended	12 Months Ended				1 Months Ended		0 Months Ended	1 Months Ended	0 Months Ended	1 Months Ended		12 Months Ended	1 Months Ended
	Oct. 13, 2011	Mar. 10, 2010	Sep. 28, 2012	May 14, 2012	Mar. 09, 2012	Jun. 30, 2012	Jun. 30, 2013	Mar. 14, 2012	Jun. 30, 2011	Oct. 30, 2002 Series B Preferred Stock [Member]	Jun. 30, 2013 Series B Preferred Stock [Member]	Jun. 30, 2012 Series B Preferred Stock [Member]	Dec. 31, 2000 Series B Preferred Stock [Member]	Jun. 30, 2013 Series D Preferred Stock [Member]	Oct. 12, 2010 Private Placement [Member]	Feb. 29, 2004 Private Placement [Member]	Mar. 10, 2010 Institutional Investors [Member]	Dec. 31, 2009 Institutional Investors [Member]	Oct. 07, 2011 Institutional and Accredited Investors [Member]	Oct. 12, 2010 Institutional and Accredited Investors [Member]	Jun. 20, 2013 Accredited Investors [Member]	Jun. 30, 2013 Accredited Investors [Member]	Jun. 20, 2013 Accredited Investors [Member] Series D Preferred Stock [Member]	Jun. 17, 2013 Underwritten Public Offering [Member]	Oct. 30, 2002 Minimum [Member] Series B Preferred Stock [Member]	Oct. 30, 2002 Maximum [Member] Series B Preferred Stock [Member]
Equity Offering Program [Line Items]
Aggregate direct offerings of common stock						26,999,000	35,339,000									2,680,185		1,700,000	2,937,497	3,750,000
Common shares, selling price per share																$ 27.50			$ 0.001
Gross proceeds from sale of common stock																$ 73,700,000			$ 4,100,000
Net proceeds after deducting placement agent fees and and offering expenses	3,600,000	3,540,000		4,000,000											4,460,000	69,100,000
Number Of Shares Convertible Cumulative Preferred Stock Sold													50,000
Preferred stock, selling price per share													$ 25.00
Aggregate offering price of preferred stock													1,200,000
Preferred stock dividends payable rate per annum													10.00%							15.00%
Preferred stock, conversion price										$ 2.80			$ 3.75												$ 1.75
Number of consecutive trading days										10 days			10 days
Number of trading day prior to notice of conversion													1 day
Maximum percentage of preferred stock can be converted per month													20.00%
Preferred stock redeemable period at the option of issuer													The Series B preferred stock is redeemable at the option of the company at any time commencing one year after issuance or not less than 30 nor more than 60 days after written notice
Preferred stock redemption price per share													$ 25.00
Number of consecutive trading days													20 days
Number of consecutive trading days prior to notice of redemption													10 days
Maximum closing bid price of common stock													$ 7.50
Preferred stock, outstanding shares										28,000	28,000
Number of shares issued upon conversion of preferred stock							3,551,541																		250,000	400,000
Agreed to defer its ability to redeem preferred shares for a period										In consideration of obtaining the consent of the holder of the outstanding Series B preferred stock, the company agreed to defer its ability to redeem those shares for a period of two years.
Number of preferred stock, shares converted											22,000
Number of preferred stock, shares outstanding											28,000
Preferred stock redeemed											0	0
Common stock purchase warrants to purchase common stock		85,000																1,700,000	1,468,752
Gross proceeds from sale of common stock																		3,400,000
Purchase price of common stock and warrants																		$ 2.00	$ 1.40
Exercisable period of warrants		5 years	54 months		54 months										54 months			90 days			54 months			5 days
Exercise price of warrants		$ 2.50	$ 1.34				$ 1.34		$ 1.40					$ 0.95	$ 1.40			$ 2.00	$ 2.00
Number of warrants exercised																	349,493
Proceeds from exercise of warrants		700,000
Value of Securities issued or sold In Private Placement																				5,000,000
Number of units of securities sold																				1,250,000
Private placement securities, price per unit																				4.00
Number of preferred stock issued											28,000									1,250,000
Warrants to purchase additional shares of common stock																				3,125,000
Fair value of warrants								4,676,000							2,850,000				1,830,000					3,330,000
Number of common stock consist in each unit																				3				1
Number of preferred stock consist in each unit																				1
Number of warrant consist in each unit																				2.5				1
Effective declaration statement of registration statement						December 9, 2010
Percentage of Liquidation damages to investors						1.00%
Limitation on Registration Default, percentage						6.00%
Percentage of registrable securities covered by registration statement						100.00%
Number of preferred stock issued																							665,000
Common stock purchase warrants to purchase common stock																					6,650,000	6,650,000
Proceeds from Senior secured note																					6,500,000
Additional cash proceeds																					150,000	150,000
Net proceeds after deducting placement agent fees and offering expenses																					30,000
Exercise price of common stock																					0.95			0.95
Allocation of proceeds to fair value of warrants																							2,980,000
Beneficial conversion feature in preferred stock																							2,150,000
Underwritten public offering																								4,683,685
Underwritten public offering Price per unit																								$ 0.95
Net proceeds after deducting placement agent fees and and offering expenses																								$ 3,930,000