Redeemable Preferred Stock and Stockholders' Equity - Additional Information (Detail) - USD ($)				3 Months Ended		12 Months Ended
	Jan. 09, 2023	Jun. 27, 2022	Jul. 23, 2020	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 01, 2022	Mar. 06, 2018
Temporary Equity And Stockholders Equity [Line Items]
Temporary equity preferred stock, shares authorized				1,000,000
Common stock, shares authorized				180,000,000		180,000,000
Common stock, shares issued				26,329,000		7,723,000
Common stock value				$ 26,000		$ 8,000
Proceeds from the exercise of common stock warrants				$ 14,000	$ 0
Common stock, par value				$ 0.001		$ 0.001
Series G Preferred stock, shares authorized				1,000,000
Additional paid-in-capital				$ 310,802,000		$ 301,782,000
Compensation expense related to stock options				700,000	200,000
Total unrecognized compensation expense				1,000,000.0	$ 800,000
Accrued liabilities				7,977,000		9,210,000
Other liabilities				$ 78,000		362,000
Unrecognized share based compensation expense to be recognized over weighted-average period				10 months 24 days
Stock Compensation Liability				$ 200,000
Common stock offered				2,700,000	900,000
Allocated Share-based Compensation Expense				$ 691,000	$ 209,000
July 2020 Warrants
Temporary Equity And Stockholders Equity [Line Items]
Proceeds from issuance of warrants				15,300,000
Warrants issued in connection with debt instruments				$ 15,300,000
July 2020 Warrants | Rights Offering
Temporary Equity And Stockholders Equity [Line Items]
Allocated to the warrants based upon fair values			$ 15,300,000
June 2022 Warrants [Member]
Temporary Equity And Stockholders Equity [Line Items]
Weighted average exercise price of warrants		$ 0.001
Sale of common stock and pre-funded warrants, net of fees ,shares		678,745
Proceeds from offering		$ 6,500,000
Combined purchase price of share and warrant		$ 4.625
January 2023 Warrants
Temporary Equity And Stockholders Equity [Line Items]
Equity raise of gross proceeds	$ 8,500,000
Warrant issued	11,403,571
Weighted average exercise price of warrants	$ 0.01
Common stock, par value				$ 0.001
Sale of common stock and pre-funded warrants, net of fees ,shares	17,167,855
Proceeds from offering	$ 9,900,000
Combined purchase price of share and warrant	$ 0.35
January 2023 Prefunded Warrants
Temporary Equity And Stockholders Equity [Line Items]
Combined purchase price of share and warrant	$ 0.34
June 2022 Pre-Funded Warrants [Member]
Temporary Equity And Stockholders Equity [Line Items]
Equity raise of gross proceeds		$ 5,600,000
Warrant issued										726,660
Combined purchase price of share and warrant		$ 4.624
Series F Convertible Preferred Stock
Temporary Equity And Stockholders Equity [Line Items]
Conversion price			$ 10.00
Series F Convertible Preferred Stock
Temporary Equity And Stockholders Equity [Line Items]
Temporary equity preferred stock, shares authorized			18,000
Common stock value			$ 1,000
Proceeds from issuance of warrants				$ 2,700,000
Proceeds of common stock and warrants			18,000,000.0
Warrants issued in connection with debt instruments				$ 2,700,000
Deemed dividend on convertible preferred stock			$ 2,700,000			$ 200,000	$ 500,000
Series G Preferred stock, shares authorized			18,000
Conversion of preferred stock into common stock			1,800,000
Convertible preferred stock, shares outstanding				0		0
Preferred stock par value			$ 0.001
Series F Convertible Preferred Stock | Rights Offering
Temporary Equity And Stockholders Equity [Line Items]
Proceeds allocated to the warrants based upon fair values			$ 2,700,000
Deemed dividend on convertible preferred stock								$ 14,700,000
Series G Redeemable Preferred Stock
Temporary Equity And Stockholders Equity [Line Items]
Preferred stock, par value									$ 0.001
Private Placement | June 2022 Warrants [Member]
Temporary Equity And Stockholders Equity [Line Items]
Warrant issued		1,405,405
2002 Stock Incentive Plan
Temporary Equity And Stockholders Equity [Line Items]
Common Stock Issued Pursuant To Options Exercised				41,000
Common stock authorized for issuance				124,400
Common stock issued pursuant to options exercised				41,000
Options and restricted stock units outstanding				22,000
Options available for future grants				0
2018 Long-Term Incentive Plan
Temporary Equity And Stockholders Equity [Line Items]
Increase in Number of Units Available for Issuance				100,000
Options and restricted stock units outstanding				1,000,000.0
2018 Long-Term Incentive Plan | Common Stock
Temporary Equity And Stockholders Equity [Line Items]
Common stock authorized for issuance				1,500,000
Phantom Share Units (PSUs)
Temporary Equity And Stockholders Equity [Line Items]
Additional paid-in-capital				$ 200,000		$ 100,000
Other liabilities				300,000		$ 300,000
Allocated Share-based Compensation Expense				100,000	100,000
Shares issued in period						31,000	402,000
Stock Appreciation Rights (SARs)
Temporary Equity And Stockholders Equity [Line Items]
Additional paid-in-capital					500,000
Accrued liabilities					$ 200,000
Allocated Share-based Compensation Expense				$ 0
Shares issued in period							39,000
June 2020 Warrants
Temporary Equity And Stockholders Equity [Line Items]
Common stock, shares issued			100,000
June 2020 Warrants | Series F Convertible Preferred Stock
Temporary Equity And Stockholders Equity [Line Items]
Warrant issued			45,000,000