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Quarterly report pursuant to Section 13 or 15(d)

Nature of Operations and Liquidity (Liquidity) (Details)

v3.19.2
Nature of Operations and Liquidity (Liquidity) (Details) - USD ($)
3 Months Ended
Mar. 06, 2019
Jul. 31, 2019
Jul. 31, 2018
Apr. 30, 2019
Nov. 05, 2018
Product Information [Line Items] Ìý Ìý Ìý Ìý Ìý
Approximate cash position Ìý $ 7,243,580 $ 10,423,660 $ 9,519,352 Ìý
Restricted cash Ìý 452,021 Ìý $ 448,400 Ìý
Cash used in operating activities Ìý 1,685,083 3,388,210 Ìý Ìý
Cash used during period Ìý $ 2,272,151 $ 4,188,899 Ìý Ìý
Loan Agreements [Member] | Leon and Toby Cooperman Family Foundation [Member] Ìý Ìý Ìý Ìý Ìý
Product Information [Line Items] Ìý Ìý Ìý Ìý Ìý
Proceeds from debt $ 10,000,000 Ìý Ìý Ìý Ìý
Commitment fee percentage, payable quarterly 1.00% Ìý Ìý Ìý Ìý
Loan Agreement One [Member] Ìý Ìý Ìý Ìý Ìý
Product Information [Line Items] Ìý Ìý Ìý Ìý Ìý
Loan agreement principal amount $ 5,000,000 Ìý Ìý Ìý Ìý
Loan Agreement Two [Member] Ìý Ìý Ìý Ìý Ìý
Product Information [Line Items] Ìý Ìý Ìý Ìý Ìý
Loan agreement principal amount $ 5,000,000 Ìý Ìý Ìý Ìý
Revolving Credit Facility [Member] Ìý Ìý Ìý Ìý Ìý
Product Information [Line Items] Ìý Ìý Ìý Ìý Ìý
Line of credit maximum borrowing capacity Ìý Ìý Ìý Ìý $ 5,000,000