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Stockholders' Equity (Tables)

9 Months Ended

Mar. 31, 2021

	Three months ended March 31,				Nine months ended March 31,
	2021 $		2020 $		2021 $		2020 $
Research and development		508		23		1,171		55
General and administrative		1,210		73		3,077		252
		1,718		96		4,248		307

Schedule of Unvested Stock Options

	Number of Options (in thousands)			Weighted average exercise price $
Unvested at June 30, 2020		858			0.98
Granted		4,999			1.68
Vested		(1,518	)		1.46
Forfeited		(14	)		1.42
Unvested at March 31, 2021		4,325			1.62

Schedule of Warrants

	Number of Warrants (in thousands)			Weighted average exercise price $
Balance – June 30, 2020		10,309			2.71
Issuance of Adgero Warrants		2,314			3.18
Exercise of warrants ⁽ⁱ⁾		(4,871	)		1.00
Warrants issued for services ⁽ⁱⁱ⁾		600			1.74
Expiry of warrants ⁽ⁱⁱⁱ⁾		(126	)		30.00
Balance – March 31, 2021		8,226			3.36

(i)	A total of 4,399 2020 Investor Warrants were exercised at $1.00 per share and 472 warrants issued as either agent warrants or issued for services were exercised on a cashless basis for which 258 common shares were issued.

(ii)	Warrants issued for services are exercisable at various prices and expire at the various dates noted in the table below.

(iii)

The warrant expiries include the 2015 Investor Warrants, the 2015 Agent Warrants, and certain warrants issued for services. All of the expired warrants were exercisable at $30.00 per share.

Schedule of Changes in Outstanding Warrants

Description of warrants	Number (in thousands)		Exercise price $		Expiry date
2020 Investor warrants		3,338		1.00	August 16, 2024
2019 Investor warrants		760		3.10	June 5, 2024
2019 Investor warrants		280		12.50	September 22, 2022
2017 Investor warrants		208		35.00	April 19, 2022
NBTS Warrants		125		1.09	June 19, 2025 (i)
Warrants issued for services		6		17.80	January 25, 2023
Warrants issued for services		34		11.70	February 27, 2023
Warrants issued for services		12		9.00	September 15, 2023
Warrants issued for services		2		9.00	October 11, 2023
Warrants issued for services		280		0.75	November 18, 2023
Warrants issued for services		125		0.64	January 20, 2024
Warrants issued for services		330		1.49	September 22, 2023
Warrants issued for services		50		1.82	November 13, 2023
Warrants issued for services		100		1.47	January 20, 2024
Warrants issued for services		70		2.75	February 17, 2024
Warrants issued for services		50		2.38	February 25, 2024
2020 Underwriter Warrants		30		1.15	August 14, 2022
2019 Agent warrants		47		3.88	June 3, 2024
2018 Agent warrants		40		12.50	September 20, 2022
2017 Agent warrants		14		40.60	April 12, 2022
2016 Agent warrants		10		40.00	May 12, 2021
Adgero Warrants		1,206		3.18	April 8, 2021
Adgero Warrants		353		3.18	August 31, 2021
Adgero Warrants		756		3.18	January 17, 2022
		8,226

(i)	NBTS Warrants were issued in connection with respect to the NBTS Loan (note 7).

Series C Warrants [Member]

Class Of Stock [Line Items]

Schedule of Changes in Outstanding Warrants

Series C Agent Warrants	Number		Conversion price $		Number of conversion shares (in thousands)		Cumulative common stock dividends (in thousands)
Series 1		1,934		1.16		1,667		1,167
Series 2		219		1.21		180		126
Series 3		296		1.15		257		180
		2,449				2,104		1,473

Schedule of Conversion of Series C Preferred Stock to Series C Warrants

	Balance June 30, 2020		Number of Warrants Issued		Number of Warrants Exercised			Balance, March 31, 2021		Conversion price $
Issuance of Preferred Series C-1 Agent Warrants		—		1,959		(25	)		1,934		1.16
Issuance of Preferred Series C-2 Agent Warrants		—		219		—			219		1.21
Issuance of Preferred Series C-3 Agent Warrants		—		326		(30	)		296		1.15
		—		2,504		(55	)		2,449

Stock options [Member]

Class Of Stock [Line Items]

Schedule of Outstanding Under the Legacy Plan

	Number of stock options outstanding (in thousands)			Weighted average exercise price
Balance – June 30, 2020		1,559			4.61
Granted		4,999			1.68
Exercised		(69	)		0.61
Expired		(22	)		41.44
Forfeited		(14	)		1.42
Balance – March 31, 2021		6,453			2.26

Summary of Stock Options Currently Outstanding and Exercisable

Exercise price $		Number Outstanding at March 31, 2021 (in thousands)		Weighted average remaining contractual life (years)		Number exercisable at March 31, 2021 (in thousands)
	0.61		941		8.43		836
	0.74		250		8.61		42
	1.36		300		9.48		50
	1.70		4,699		9.46		943
	6.10		30		7.60		28
	7.00		3		7.23		3
	8.70		12		6.59		12
	9.83		83		7.14		79
	10.60		4		7.03		4
	11.70		30		1.91		30
	15.90		3		1.17		3
	20.00		9		0.83		9
	21.10		14		6.27		14
	29.60		5		3.84		5
	37.60		5		4.86		5
	41.00		4		5.61		4
	42.00		33		2.37		33
	44.80		3		4.86		3
	49.50		13		5.88		13
	53.20		8		5.10		8
	61.60		1		2.00		1
	92.00		3		2.17		3
			6,453				2,128

Schedule of Valuation Assumptions Using a Black-Scholes Pricing Model

	March 31, 2021
Dividend rate		—	%
Volatility	121% to 153		%
Risk-free rate	0.19% to 0.42		%
Term – years	0.4 to 5.8

Performance stock units [Member]

Class Of Stock [Line Items]

Schedule of Issuance of Series C Preferred Stock

	Series C Preferred Stock
	Number of shares			$ (in thousands)
Balance – June 30, 2020		—			—
Issuance		25,028			18,286
Issued on exercise of Series C Preferred Agent Warrants		31			71
Conversion of Series C Preferred stock to common stock		(4,156	)		(3,106	)
Balance – March 31, 2021		20,903			15,251

Schedule of Conversion of Series B Preferred Stock to Common Stock

	Series B Preferred Stock (in thousands)
	Number of shares			$
Balance – June 30, 2020		649			4,525
Conversion of Series B Preferred stock to common stock		(48	)		(329	)
Balance – March 31, 2021		601			4,196