Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Tables)

v3.21.1
Summary of Significant Accounting Policies (Tables)
9 Months Ended
Feb. 28, 2021
Accounting Policies [Abstract]  
Reconciliation of Liability Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level 3)

The following is a reconciliation of the beginning and ending balances for liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) from inception to the year ended May 31, 2020 (in thousands):

Investor warrants issued with registered direct equity offering

    

$

4,360

Placement agent warrants issued with registered direct equity offering

 

819

Fair value adjustments

 

(3,855)

Balance at May 31, 2018

 

1,324

Inception date value of redemption provisions

 

2,750

Fair value adjustments—convertible notes

 

(745)

Fair value adjustments—warrants

 

(922)

Balance at May 31, 2019

2,407

Fair value adjustments—convertible notes

 

(2,005)

Fair value adjustments—warrants

 

11,547

Exercise of derivative warrants

 

(11,949)

Balance at May 31, 2020

$

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

Three and Nine Months Ended

February 28,

February 29,

    

2021

    

2020

Stock options, warrants & unvested restricted stock

68,857

173,186

Convertible notes payable

12,000

8,108

Convertible preferred stock

32,159

28,387