Consolidated Balance Sheets - USD ($)	Mar. 31, 2024	Jun. 30, 2023
Cash and cash equivalents	$ 10,014,088	$ 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	254,554	1,897,281
Total current assets	10,268,642	16,321,513
Property and equipment, net	465,410	684,910
Right-of-use assets - operating leases	615,269	876,101
Other assets	56,916	56,916
Total assets	11,406,237	17,939,440
Accounts payable	3,443,247	4,303,527
Accrued expenses	2,364,964	6,511,059
Short-term operating lease liabilities	371,280	354,052
Short-term finance lease liabilities	73,141	106,392
Other current liabilities	2,280,150	3,856,800
Total current liabilities	8,532,782	15,131,830
Long-term operating lease liabilities	262,220	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	9,827,302	19,655,911
Commitments and contingencies (Note 13)
Contingently redeemable warrants	0	263,400
Preferred stock of $0.01 par value - authorized 10,000,000 shares: shares issued and outstanding designated as follows:
Common stock of $0.01 par value - authorized 300,000,000 shares issued and outstanding 16,136,640 shares as of March 31, 2024 and 11,656,714 shares as of June 30, 2023	161,366	116,567
Additional paid-in capital	434,933,649	409,933,959
Accumulated deficit	(433,516,120)	(412,030,437)
Total stockholders' equity (deficiency)	1,578,935	(1,979,871)
Total liabilities and stockholders' equity (deficiency)	11,406,237	17,939,440
Series A Convertible Preferred Stocks [Member]
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 March 31, 2024: issued and outstanding 4,030 shares as of March 31, 2024 and June 30, 2023	$ 40	$ 40