Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 4,524,734	$ 9,033,872
Restricted cash	500,809	500,809
Accounts receivable, net	14,089,590	16,497,626
Subscription acquisition costs, current portion	31,171,595	28,146,895
Royalty fees, current portion	15,000,000	15,000,000
Prepayments and other current assets	6,422,576	4,667,263
Total current assets	71,709,304	73,846,465
Property and equipment, net	1,117,403	1,129,438
Operating lease right-of-use assets	18,108,197	18,292,196
Platform development, net	7,463,671	7,355,608
Royalty fees, net of current portion	7,500,000	11,250,000
Subscription acquisition costs, net of current portion	18,682,545	13,358,585
Acquired and other intangible assets, net	66,550,845	71,501,835
Other long-term assets	1,568,502	1,330,812
Goodwill	16,139,377	16,139,377
Total assets	208,839,844	214,204,316
Current liabilities:
Accounts payable	10,148,600	8,228,977
Accrued expenses and other	16,735,761	14,718,193
Line of credit	5,426,790	7,178,791
Unearned revenue	65,863,189	61,625,676
Subscription refund liability	4,772,991	4,035,531
Operating lease liabilities	1,022,294	1,059,671
Liquidated damages payable	9,822,725	9,568,091
Warrant derivative liabilities	1,812,931	1,147,895
Total current liabilities	115,605,281	107,562,825
Unearned revenue, net of current portion	28,300,040	23,498,597
Restricted stock liabilities, net of current portion	1,519,156	1,995,810
Operating lease liabilities, net of current portion	19,680,225	19,886,083
Other long-term liabilities	597,678	753,365
Deferred tax liabilities	210,832	210,832
Long-term debt	64,754,198	62,194,272
Total liabilities	230,667,410	216,101,784
Commitments and contingencies (Note 12)
Mezzanine equity:
Total mezzanine equity	18,415,992	18,415,992
Stockholders' deficiency:
Common stock, $0.01 par value, authorized 1,000,000,000 shares; issued and outstanding: 37,474,736 and 37,119,117 shares at March 31, 2021 and December 31, 2020, respectively	2,303,264	2,290,851
Common stock to be issued	10,809	10,809
Additional paid-in capital	145,178,960	139,658,166
Accumulated deficit	(187,736,591)	(162,273,286)
Total stockholders' deficiency	(40,243,558)	(20,313,460)
Total liabilities, mezzanine equity and stockholders' deficiency	208,839,844	214,204,316
Series G Redeemable and Convertible Preferred Stock [Member]
Mezzanine equity:
Total mezzanine equity	168,496	168,496
Series H Convertible Preferred Stock [Member]
Mezzanine equity:
Total mezzanine equity	$ 18,247,496	$ 18,247,496