Consolidated Balance Sheets - USD ($)	Jun. 30, 2024	Jun. 30, 2023
Cash and cash equivalents	$ 9,527,396	$ 7,989,582
Marketable securities	0	2,992,890
Accounts receivable	0	2,915,760
Inventories	0	526,000
Prepaid expenses and other current assets	242,272	1,897,281
Total current assets	9,769,668	16,321,513
Property and equipment, net	388,361	684,910
Right-of-use assets - operating leases	527,321	876,101
Other assets	56,916	56,916
Total assets	10,742,266	17,939,440
Accounts payable	4,101,929	4,303,527
Accrued expenses	4,185,046	6,511,059
Short-term operating lease liabilities	380,542	354,052
Short-term finance lease liabilities	46,014	106,392
Other current liabilities	944,150	3,856,800
Total current liabilities	9,657,681	15,131,830
Long-term operating lease liabilities	163,782	544,323
Long-term finance lease liabilities	0	46,014
Other long-term liabilities	1,032,300	2,083,200
Warrant liabilities	0	1,850,544
Total liabilities	10,853,763	19,655,911
Commitments and contingencies (Note 14)
Contingently redeemable warrants	0	263,400
Stockholders' deficiency:
Common stock of $0.01 par value - authorized 300,000,000 shares issued and outstanding 17,926,640 shares as of June 30, 2024 and 11,656,714 shares as of June 30, 2023	179,266	116,567
Additional paid-in capital	441,475,747	409,933,959
Accumulated deficit	(441,766,550)	(412,030,437)
Total stockholders' deficiency	(111,497)	(1,979,871)
Total liabilities and stockholders' deficiency	10,742,266	17,939,440
Series A Convertible Preferred Stocks [Member]
Stockholders' deficiency:
Preferred stock of $0.01 par value - authorized 10,000,000 shares: shares issued and outstanding designated as follows: Series A Convertible: authorized 4,030 shares as of June 30, 2024: issued and outstanding 4,030 shares as of June 30, 2024 and June 30, 2023	$ 40	$ 40