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INCOME TAXES (Tables)
12 Months Ended
May 31, 2020
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

 Years ended May 31,

2020

2019

Current:

 

 

 

 

 

 

U.S. Federal

$

 --

$

 --

Foreign Taxes Subsidiaries

 

 

(6,590)

 

 

(13,437)

State and local

 

(800)

 

(800)

Total current

 

 

(7,390)

 

 

(14,237)

Deferred:

U.S. Federal 

 

 

 --

 

 

(10,000)

State and local

 

 --

 

 --

Total deferred

 

 

 --

 

 

(10,000)

Income tax expense

$

(7,390)

$

(24,237)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Years ended May 31,

 

2020

 

2019

Computed "expected" tax benefit

 

$

489,651

 

$

497,453

Increase (reduction) in income taxes resulting from:

           

Change in valuation allowance

 

 

(716,000)

 

 

(910,000)

State income taxes, net of federal benefit

   

154,254

   

89,267

Research and development tax credits

 

 

49,770

 

 

55,908

Permanent tax differences and other

   

21,525

   

(256,572)

Foreign taxes of subsidiaries

 

 

(6,590)

 

 

(13,437)

Income tax expense

 

$

(7,390)

 

$

(24,237)

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

As of May 31,

 

2020

 

2019

Deferred tax assets:

 

 

 

 

 

 

Accounts receivable, principally due to allowance for doubtful accounts

 

$

17,000

 

$

18,000

Inventory valuation   

 

 

16,000

 

 

12,000

Compensated absences

   

64,000

   

48,000

Net operating loss carryforwards   

 

 

2,286,000

 

 

1,735,000

Tax credit carryforwards

   

599,000

   

467,000

Deferred rent expense/Capitalized leases

 

 

17,000

 

 

9,000

Other

   

171,000

   

176,000

Accumulated depreciation and amortization

 

 

5,000

 

 

(6,000)

Total deferred tax assets   

   

3,175,000

   

2,459,000

Less valuation allowance

 

 

(3,175,000)

 

 

(2,459,000)

Net deferred tax asset

 

$

 --

 

$

 --