Stockholders' Equity - Additional Information (Detail)				1 Months Ended	6 Months Ended	12 Months Ended
	Apr. 14, 2022 USD ($) $ / shares shares	Sep. 28, 2021 USD ($) $ / shares shares	Aug. 19, 2021 USD ($) $ / shares	Sep. 30, 2014 $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) $ / shares shares	Jun. 30, 2016 shares	Jun. 21, 2022 shares	Jun. 20, 2022 $ / shares shares	Jun. 25, 2021 shares	Jun. 24, 2021 shares	Apr. 14, 2021 USD ($)	Jun. 30, 2020 shares
Class Of Stock [Line Items]
Shares issued, price per share | $ / shares					$ 1,000	$ 1,000
Non cash dividends of preferred stock | $							$ 3,181,000
Series B preferred stock dividend, shares							11,000
Preferred stock, par value | $ / shares					$ 0.001	$ 0.001	$ 0.001
Common stock shares authorized					275,000,000	275,000,000	175,000,000
Underwritten Public Offerings Description	the Company closed on the sale of 16,266 shares of its common stock, par value $0.001 per share, and common warrants to purchase an aggregate of 16,266 shares of common stock (“2022 April Investor Warrants”) in the Company’s registered direct offering (the “April Offering”). Each share of common stock was sold together with a 2022 April Investor Warrant to purchase one share of common stock at a combined effective price of $0.53 per share of common stock and accompanying 2022 April Investor Warrant. The 2022 April Investor Warrants have been valued at $3,898 and have been treated as equity. They have been valued using a Black-Scholes valuation with a risk-free rate of 0.54%, a contractual term of 5 years, a volatility of 109.4%, and a dividend rate of 0%.	the Company closed on the sale of (i) 7,200 shares of its common stock, par value $0.001 per share, (ii) pre-funded warrants (“PFW”) to purchase an aggregate of 4,800 shares of common stock and (iii) common warrants to purchase an aggregate of 12,000 shares of common stock (“2022 Investor Warrants”) in the Company’s registered direct offering (the “September Offering”). Each share of common stock, or PFW as applicable, was sold together with a 2022 Investor Warrant to purchase one share of common stock at a combined effective price of $1.25 per share of common stock and accompanying 2022 Investor Warrant. The 2022 Investor Warrants have been valued at $7,023 and have been treated as equity. They have been valued using a Black-Scholes valuation with a risk-free rate of 0.55%, a contractual term of 3.5 years, a volatility of 116.7%, and a dividend rate of 0%.
Warrants exercise price | $ / shares	$ 0.001
Common stock, shares issued					65,533,000	65,533,000	32,740,000
Warrants exercised for cash | $						$ 74,000	$ 4,404,000
Number of options granted						3,964	5,074
Total compensation expense | $						$ 2,248,000	$ 5,276,000
Stock options exercisable					4,611,000	4,611,000
Number of stock options outstanding					8,810,000	8,810,000
Aggregate intrinsic value of unvested stock options | $							$ 2,577,000
2017 Omnibus Incentive Plan [Member]
Class Of Stock [Line Items]
Common stock, shares issued					22,000,000	22,000,000
Common stock, shares outstanding					117,000	117,000
Common stock issued under the 2017 Plan					8,693,000	8,693,000	12,996,000
Percentage of fully diluted shares of common stock						8.00%
2017 Omnibus Incentive Plan [Member]
Class Of Stock [Line Items]
Stock option vesting description					vest in 12 equal monthly installments beginning on October 22, 2021. The remaining 3,519 stock options granted have an exercise price of $0.96 per share and vest as to 25% on November 8, 2022, with the remaining portion vesting in equal monthly installments over a period of 36 months commencing on December 8, 2022. All of the options to purchase shares of common stock granted have a 10-year term and are subject to cancellation upon the grantees’ termination of service for the Company, with certain exceptions.In addition, 2,715 stock options previously issued to an officer of the Company were modified such that 754 stock options that were to vest over the period December 15, 2022, to September 15, 2023, were changed to vest on a contingent basis dependent on the achievement of certain strategic partnership initiatives. As the conditions to meet the contingent vesting were unlikely to be met, the compensation expense for these stock options was recognized over the pre-amendment basis. The contingent vesting stock options were subsequently forfeited upon the termination of that officer. In relation to the termination of two officers of the Company, the Company has recognized $120 in stock option expense due to the acceleration of vesting of certain stock options granted to those officers.
Stock option term					10 years
2017 Omnibus Incentive Plan [Member] | Exercise Price of 1.24 [Member]
Class Of Stock [Line Items]
Number of options granted					3,954,000
Stock option exercise price | $ / shares					$ 1.24	$ 1.24
Stock options exercise price | $ / shares					1.24	1.24
2017 Omnibus Incentive Plan [Member] | Exercise Price Of Zero Point Nine Six
Class Of Stock [Line Items]
Stock option exercise price | $ / shares					0.96	0.96
Stock options exercise price | $ / shares					$ 0.96	$ 0.96
Stock options [Member]
Class Of Stock [Line Items]
Number of options granted						3,964,000	5,074,000
Stock option exercise price | $ / shares							$ 0.61
Number of options forfeited						1,237,000	32,000
Stock options exercised, Shares							195,000
Number of stock options outstanding					8,810,000	8,810,000	6,392,000							1,559,000
Aggregate intrinsic value of stock options outstanding | $					$ 0	$ 0	$ 4,759,000
Aggregate intrinsic value of stock options exercisable | $					0	0	$ 2,181,000
Unrecognized compensation expense | $					$ 1,792,000	$ 1,792,000
Unrecognized compensation expense, term						2 years 3 months
Aggregate intrinsic value of unvested stock options | $						$ 0
Weighted average contractual term						9 years 2 months 8 days	9 years 1 month 28 days
Stock options [Member] | Minimum
Class Of Stock [Line Items]
Risk-free interest rate						0.88%	0.19%
Expected Term						5 years 3 months 18 days	4 months 24 days
Volatility Rate						91.00%	103.00%
Stock options [Member] | Maximum
Class Of Stock [Line Items]
Risk-free interest rate						2.18%	1.28%
Expected Term						6 years 1 month 6 days	5 years 10 months 24 days
Volatility Rate						94.00%	152.00%
Common stock
Class Of Stock [Line Items]
Convertible preferred stock							162,000
Series B preferred stock dividend, shares							11,000
Conversion of Series B preferred stock to common stock, shares							162,000
Common stock shares authorized									275,000,000	175,000,000	175,000,000	95,000,000
Issued warrants to underwriters	16,266,000	7,200,000
Issuance of shares and warrants - net of issue costs, shares						23,427,000
Warrants exercise price | $ / shares		$ 0.001
Stock options exercised, Shares							170,000
Pre-Funded Warrants
Class Of Stock [Line Items]
Issued warrants to underwriters		4,800,000
Warrants exercise price | $ / shares										$ 0.001
Number					4,800,000	4,800,000
Warrants exercised for cash | $						$ 4,800
2022 Investor Warrant [Member]
Class Of Stock [Line Items]
Issued warrants to underwriters		12,000,000
Value of outstanding warrants | $		$ 7,023,000
Risk-free interest rate		0.55%
Expected Term		3 years 6 months
Volatility Rate		116.70%
Dividend Rate		0.00%
Other Underwriting Expense | $		$ 13,634,000
Expiry date		Mar. 28, 2025
2022 April Investor Warrant [Member]
Class Of Stock [Line Items]
Issued warrants to underwriters	16,266,000
Value of outstanding warrants | $													$ 3,898,000
Risk-free interest rate	0.54%
Expected Term	5 years
Volatility Rate	109.40%
Dividend Rate	0.00%
Other Underwriting Expense | $	$ 7,900,000
Expiry date	Apr. 14, 2027
Placement Agent | Series C Agent Warrants [Member]
Class Of Stock [Line Items]
Fair value disclosure | $					$ 3,287,000	$ 3,287,000
Warrants outstanding, term					4 years	4 years
Placement Agent | Series C Agent Warrants [Member] | Measurement Input, Risk Free Interest Rate
Class Of Stock [Line Items]
Warrants outstanding, measurement input					0.27	0.27
Placement Agent | Series C Agent Warrants [Member] | Minimum | Measurement Input, Price Volatility
Class Of Stock [Line Items]
Warrants outstanding, measurement input					95.2	95.2
Placement Agent | Series C Agent Warrants [Member] | Maximum | Measurement Input, Price Volatility
Class Of Stock [Line Items]
Warrants outstanding, measurement input					95.8	95.8
Executive Officers and Directors | 2017 Omnibus Incentive Plan [Member] | Exercise Price of 1.24 [Member]
Class Of Stock [Line Items]
Number of options granted					435,000
Executive Officers and Directors | 2017 Omnibus Incentive Plan [Member] | Exercise Price Of Zero Point Nine Six
Class Of Stock [Line Items]
Number of options granted					3,519,000
Series C Preferred Stock
Class Of Stock [Line Items]
Shares issued of common stock for services							25,028
Dividends, Preferred Stock | $			$ 1,698,000
Sale of Stock, Price Per Share | $ / shares			$ 1.45
Preferred stock | $			$ 2,462,000		$ 12,275,000	$ 12,275,000	$ 14,652,000
Non cash dividends of preferred stock | $							$ 3,181,000
Liquidation value | $					$ 16,838,000	$ 16,838,000
Preferred Stock, shares issued					17,000	17,000	20,000
Preferred stock, shares outstanding					17,000	17,000	20,000
Number					16,838,000	16,838,000
Series C-1 Preferred Shares [Member]
Class Of Stock [Line Items]
Conversion price | $ / shares					$ 1.16	$ 1.16
Number					13,945,000	13,945,000
Series C-2 Preferred Shares [Member]
Class Of Stock [Line Items]
Conversion price | $ / shares					$ 1.214	$ 1.214
Number					898,000	898,000
Series C3 Preferred Shares [Member]
Class Of Stock [Line Items]
Conversion price | $ / shares					$ 1.15	$ 1.15
Number					1,995,000	1,995,000
Series B Preferred Stock
Class Of Stock [Line Items]
Stock issued during period shares new issues								902,000
Preferred stock, rate of dividend						9.00%
Convertible preferred stock							649,000
Series B preferred stock dividend, shares						0
Direct increase in accumulated deficit | $						$ 0	$ 17,000
Preferred Stock Series A
Class Of Stock [Line Items]
Preferred stock | $					$ 279,000	279,000	$ 279,000
Preferred stock, rate of dividend				3.00%
Liquidation value | $					$ 279,000	$ 279,000
Preferred Stock, shares issued					279,000	279,000	279,000
Preferred stock, shares outstanding					279,000	279,000	279,000
Change in preferred stock | $						$ 0	$ 0
Preferred Stock Series A | Exchange Agreement
Class Of Stock [Line Items]
Preferred stock, rate of dividend				3.00%
Preferred Stock, shares issued				279
Preferred stock, par value | $ / shares				$ 1.00
Private Placement [Member] | Series C Preferred Stock
Class Of Stock [Line Items]
Proceeds from private placement | $						25,028,000
Net proceeds from private placement | $						21,598,000
Deferred financing costs | $						$ 3,455,000
Private Placement [Member] | Series C Preferred Stock | Series C Agent Warrants [Member]
Class Of Stock [Line Items]
Stock issued during period shares new issues						2,504
Fair value of preferred stock | $						$ 3,287,000
Private Placement [Member] | Series C Preferred Stock Warrants [Member]
Class Of Stock [Line Items]
Shares issued of common stock for services						2,504
Shares issued, price per share | $ / shares					$ 1,000	$ 1,000
Registered direct financing [Member]
Class Of Stock [Line Items]
Number		600,000
Registered direct financing [Member] | 2022 April Investor Warrant [Member]
Class Of Stock [Line Items]
Risk-free interest rate	0.54%
Expected Term	4 years 6 months
Volatility Rate	112.30%
Dividend Rate	0.00%
Warrants exercise price | $ / shares	$ 0.6625
Non cash issue of common stock	350,000
Number	1,623,000
Registered direct financing [Member] | 2022 Agent Warrants [Member]
Class Of Stock [Line Items]
Risk-free interest rate		0.55%
Expected Term		3 years 6 months
Volatility Rate		116.70%
Dividend Rate		0.00%
Warrants exercise price | $ / shares		$ 1.5265
Non cash issue of common stock		333,000
Merger Agreement [Member]
Class Of Stock [Line Items]
Dividend rate						0.00%
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock
Class Of Stock [Line Items]
Shares issued of common stock for services						25,028
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock | First Anniversary [Member]
Class Of Stock [Line Items]
Dividend rate						10.00%
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock | Second Anniversary [Member]
Class Of Stock [Line Items]
Dividend rate						15.00%
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock | Third Anniversary [Member]
Class Of Stock [Line Items]
Dividend rate						20.00%
Merger Agreement [Member] | Private Placement [Member] | Series C Preferred Stock | Fourth Anniversary [Member]
Class Of Stock [Line Items]
Dividend rate						25.00%