DISCONTINUED OPERATIONS: - Additional information (Details)	1 Months Ended			12 Months Ended
	May 31, 2020 USD ($)	Feb. 29, 2020 USD ($)	Apr. 26, 2019 USD ($) ft²	Apr. 30, 2020 USD ($)
Operating Leases, Future Minimum Payments, Due in one year				$ 1,900,000
Operating Leases, Future Minimum Payments, Due in Two Years				1,941,500
Operating Leases, Future Minimum Payments, Due in Three Years				1,985,328
Operating Leases, Future Minimum Payments, Due in Four Years				2,041,564
Operating Leases, Future Minimum Payments, Due in Five Years				2,105,294
Operating Leases, Future Minimum Payments, Due in Six Years				2,181,604
Operating Leases, Future Minimum Payments, Due in Seven Years				2,260,585
Operating Leases, Future Minimum Payments, Due in Eight Years				2,342,331
Operating Leases, Future Minimum Payments, Due in Nine Years				2,426,937
Operating Leases, Future Minimum Payments, Due in Ten Years				2,514,505
Accrued Pension Related Obligation				5,194,000
Voluntary Contributions To The Pension Plan				3,600,000
Cash deposit with landlords				260,000
Amount of rent paid				350,000
Non-cash impairment charges on other assets				5,046,000
Two Commerce LLC Member | First Settlement Agreement
Lease payments services business offset by receipt				625,000
Commerce Blvd Holdings | Purchase Agreement
Debt Instrument, Term			10 years
Palm Coast Data LLC [Member]
Sale of Stock, Consideration Received on Transaction			$ 1,000,000
Palm Coast Data LLC [Member] | First Settlement Agreement
Amount of claims settled		$ 625,000
Palm Coast Data LLC [Member] | Second Settlement Agreement
Amount of claims settled	$ 650,000
Palm Coast Data LLC [Member] | Discontinued Operations, Disposed of by Sale [Member]
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax				2,506,000
Disposal Group, Including Discontinued Operation, Consideration				1,000,000
Palm Coast Data LLC [Member] | Discontinued Operations, Disposed of by Sale [Member] | Transaction Costs Associated With Disposal Of An Operation Which Shall No Longer Be Continued [Member]
Disposal Group, Including Discontinued Operation, Other Expense				191,000
Palm Coast Data LLC [Member] | Discontinued Operations, Disposed of by Sale [Member] | Other Assets [Member] | Deffered [Member]
Disposal Group, Including Discontinued Operation, Consideration				5,636,000
Palm Coast Data LLC [Member] | Discontinued Operations, Disposed of by Sale [Member] | Book Value [Member]
Net Assets				$ 3,939,000
Palm Coast Data LLC [Member] | Two Commerce LLC Member
Area Of Leased Property | ft²			61,000
Palm Coast Data LLC [Member] | Commerce Blvd Holdings
Area Of Leased Property | ft²			143,000