Debt - Additional Information (Detail)										1 Months Ended							3 Months Ended				6 Months Ended		12 Months Ended
		Sep. 30, 2020 USD ($)	Jun. 12, 2020 USD ($)	Nov. 01, 2019	Aug. 09, 2019 USD ($)	Feb. 09, 2019	Nov. 01, 2018 USD ($) $ / shares	Jul. 26, 2018 USD ($)	Nov. 07, 2017 USD ($)	Jun. 30, 2020 USD ($) $ / shares shares	Aug. 31, 2019 USD ($) $ / shares	Jul. 31, 2018 USD ($)	Aug. 31, 2017 USD ($)	Jan. 31, 2016 USD ($)	Jun. 30, 2014 USD ($) $ / shares	Jul. 31, 2013 USD ($) $ / shares	Jun. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2019 USD ($)	Jun. 30, 2017 USD ($) shares	Mar. 31, 2017 USD ($) shares	Jun. 30, 2020 USD ($) $ / shares shares	Jun. 30, 2019 USD ($)	Dec. 31, 2016 USD ($)	Jun. 29, 2020 shares	Dec. 31, 2019 USD ($) $ / shares shares	Aug. 01, 2018 USD ($)	Jun. 14, 2018 USD ($)
Debt Instrument [Line Items]
Common stock, par value (in dollars per share) | $ / shares										$ 0.001							$ 0.001				$ 0.001				$ 0.001
Common stock, shares outstanding (in shares) | shares										4,239,578							4,239,578				4,239,578			42,395,782	3,521,037
Unrealized loss (gain) on fair value adjustment																	$ (7,727,000)	$ (106,000)			$ (52,000)	$ (2,529,000)
Payment-in-kind interest																					2,277,000	0
Value of debt outstanding										$ 42,257,000							42,257,000				42,257,000				$ 52,658,000
Conversion of convertible senior notes	[1]																9,473,000
Amortization of debt discount																					1,388,000	0
Debt issuance cost																											$ 1,300,000
Current portion of long term debt										1,772,000							1,772,000				1,772,000				1,905,000
Non-current portion of long term debt										174,164,000							174,164,000				$ 174,164,000				$ 174,962,000
Common Stock
Debt Instrument [Line Items]
Conversion of convertible senior notes	[1]																1,000
Additional Paid-in Capital
Debt Instrument [Line Items]
Conversion of convertible senior notes	[1]																$ 9,472,000
4.25% Convertible Senior Notes (due 2018)
Debt Instrument [Line Items]
Debt instrument, face amount								$ 8,000,000.0					$ 21,600,000			$ 100,000,000.0
Debt instrument, interest rate													4.25%			4.25%
Conversion rate																114.3674
Gain recognized on retirement of debt																$ 1,000			$ 100,000
Debt instrument, conversion rate (in dollars per share) | $ / shares																$ 8.74
Debt instrument repurchase amount																			12,000,000.0	$ 39,100,000			$ 6,100,000
Write-off of debt issuance costs																			100,000				$ 100,000
Payment for repurchase of convertible notes																				$ 24,100,000
Debt instrument shares common stock issued upon conversion (in shares) | shares																				290,000
Interest rate if paid in cash								3.25%
Interest rate if paid in stock								5.00%
Paid in kind interest rate								2.75%
Debt converted, amount												$ 8,000,000.0
4.25% Convertible Senior Notes (due 2018) | Common Stock
Debt Instrument [Line Items]
Debt instrument repurchase amount																			$ 11,600,000
Debt instrument shares common stock issued upon conversion (in shares) | shares																			11,240
3.25% Convertible Senior Notes (due 2020)
Debt Instrument [Line Items]
Debt instrument, face amount								$ 8,000,000.0
Debt instrument, interest rate								3.25%					3.25%
Debt conversion price, percentage				105.00%			105.00%
Payment-in-kind interest										200,000
Debt converted, amount										$ 7,100,000
3.25% Convertible Senior Notes (due 2020) | Common Stock
Debt Instrument [Line Items]
Debt instrument shares common stock issued upon conversion (in shares) | shares										710,100
Conversion of convertible senior notes										$ 9,500,000
4.875% convertible senior notes due 2020
Debt Instrument [Line Items]
Debt instrument, face amount											$ 113,000,000.0				$ 115,000,000.0
Debt instrument, interest rate										4.875%					4.875%		4.875%				4.875%				4.875%
Conversion rate															103.7613
Gain recognized on retirement of debt					$ (2,400,000)									$ 100,000	$ 1,000
Debt instrument, conversion rate (in dollars per share) | $ / shares															$ 9.64
Debt instrument repurchase amount														2,000,000.0
Write-off of debt issuance costs					700,000									$ 100,000
Value of debt outstanding										$ 0	111,100,000						$ 0				$ 0				$ 1,905,000
Debt refinanced, exchanged into similar debt instruments											103,800,000
Amount of accrued interest refinanced											1,000,000.0
Amount of debt exchanged into a new debt instrument											$ 7,300,000
Convertible senior notes, net of debt issuance costs										$ 1,900,000							$ 1,900,000				$ 1,900,000
Convertible senior note payable, fair value																									$ 1,700,000
3.25% convertible senior notes due 2023
Debt Instrument [Line Items]
Debt instrument, interest rate										3.25%			3.25%				3.25%				3.25%				3.25%
Conversion rate						1.00					1.00
Debt instrument shares common stock issued upon conversion (in shares) | shares										710,100
Debt conversion price, percentage											105.00%
Interest rate if paid in cash										3.25%							3.25%				3.25%
Interest rate if paid in stock										5.00%							5.00%				5.00%
Paid in kind interest rate										2.75%							2.75%				2.75%
Threshold percentage of stock price trigger											30.00%
Threshold percentage of market price trigger											150.00%
Equity method investment, ownership percentage											49.00%
Payment-in-kind interest										$ 200,000
Value of debt outstanding										42,257,000							$ 42,257,000				$ 42,257,000				$ 50,753,000
Debt converted, amount										7,100,000
Conversion of convertible senior notes										9,500,000
Convertible Senior Notes
Debt Instrument [Line Items]
Amortization of debt discount																	0	$ 200,000			0	$ 400,000
Paycheck Protection Program Loan | Unsecured debt
Debt Instrument [Line Items]
Debt instrument, face amount			$ 6,200,000
Debt instrument, interest rate			1.00%
Monthly payments			$ 261,275
Current portion of long term debt										1,800,000							1,800,000				1,800,000
Non-current portion of long term debt										4,400,000							4,400,000				4,400,000
Oasis Management and Oasis Investments ll Master Fund Ltd.
Debt Instrument [Line Items]
Common stock, par value (in dollars per share) | $ / shares											$ 0.001
Oasis Management and Oasis Investments ll Master Fund Ltd. | 3.25% Convertible Senior Notes (due 2020)
Debt Instrument [Line Items]
Debt instrument, face amount													$ 21,600,000
Debt instrument, interest rate													3.25%
Conversion rate							393.7008	322.2688					328.0302
Gain recognized on retirement of debt							$ 1,000	$ (500,000)	$ (600,000)		$ (10,400,000)		$ 1,000
Debt instrument, conversion rate (in dollars per share) | $ / shares							$ 2.54
Debt instrument, amount redeemed																										$ 13,200,000
Unrealized loss (gain) on fair value adjustment																	(7,700,000)
Payment-in-kind interest																	300,000
Oasis Management and Oasis Investments ll Master Fund Ltd. | 3.25% convertible senior notes due 2023
Debt Instrument [Line Items]
Debt instrument, face amount											$ 8,000,000.0
Secured Debt | New Term Loan Agreement
Debt Instrument [Line Items]
Debt instrument, interest rate											10.50%
Interest rate if paid in cash											8.00%
Paid in kind interest rate											2.50%
Value of debt outstanding										134,801,000							134,801,000				134,801,000				134,801,000
Amortization of debt discount																	700,000				1,400,000
Line of credit facility maximum borrowing capacity											$ 134,800,000
Debt issuance cost					3,800,000
Amortization expense debt issuance																	300,000				500,000
Debt discount					$ 10,100,000
Long term debt										$ 126,800,000							$ 126,800,000				$ 126,800,000				$ 123,400,000
Secured Debt | New Term Loan Agreement | Forecast
Debt Instrument [Line Items]
Covenant, EBITDA requirement		$ 34,000,000.0
Minimum liquidity requirement		$ 10,000,000.0

[1] After giving effect to a 1 for 10 reverse stock split effective July 9, 2020.