STOCKHOLDERS' EQUITY - Additional Information (Details)								1 Months Ended	3 Months Ended			6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 27, 2022 USD ($) shares	Jul. 05, 2022 USD ($) shares	Oct. 29, 2021 shares	Jul. 06, 2021 USD ($) director shares	Jun. 23, 2021 shares	Jan. 31, 2021 USD ($)	Jun. 12, 2019 USD ($) shares	Jan. 31, 2021 shares	Mar. 31, 2022 USD ($)	Jun. 30, 2021 USD ($) shares	Mar. 31, 2021 USD ($) shares	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2022 USD ($) Vote director $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 06, 2022 USD ($)	Mar. 07, 2022 USD ($)	May 17, 2021 USD ($) $ / shares	Aug. 31, 2020 $ / shares	May 21, 2019 shares	Jun. 02, 2015 shares	Dec. 31, 2009 shares
STOCKHOLDERS' EQUITY
Number of shares issued during period | $											$ 12,125,000		$ 33,282,000		$ 33,277,000		$ 33,277,000
Net proceeds after associated fees and expenses | $																$ 0	33,277,000
Stock Repurchased During Period, Value | $									$ 10,000		872,000	$ 24,669,000	$ 905,000	$ 26,486,000	$ 944,000	26,543,000	970,000
Share-based Compensation, Total | $																$ 6,595,000	$ 565,000
Restricted stock awards [Member]
STOCKHOLDERS' EQUITY
Other than options, granted																1,357,687	101,057
Average fair value at grant date (in dollars per share) | $ / shares																$ 4.27	$ 3.22
Other than options, vested In period																999,479	1,748,562
Other than options, unvested, number																434,264	76,056	1,723,561
Other than options, unvested, weighted average grant date fair value | $ / shares																$ 4.27	$ 3.90	$ 0.83
Employees Stock Option [Member]
STOCKHOLDERS' EQUITY
Number of options vested in period																439,180	903,643
Share-based Compensation Arrangement by Share-based Payment Award Options exercised Number of Shares																60,240	229,756
Stock options
STOCKHOLDERS' EQUITY
Stock options to purchase common stock																884,061	40,917
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares																$ 2.82	$ 2.77
Number of Options, Vested and expected to vest																4,542,266
Employee [Member]
STOCKHOLDERS' EQUITY
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares																$ 1.66
Employee Service Share-based Compensation, Non-vested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition																16 months
Employee Service Share-based Compensation, Non-vested Awards, Total Compensation Cost Not yet Recognized, Stock Options | $																$ 1,100,000
Class A And Class D Common Stock [Member]
STOCKHOLDERS' EQUITY
Stock repurchase , Authorized amount | $																			$ 10,000,000	$ 25,000,000
Stock repurchase , Authorized amount remaining | $																10,000,000.0
Class A And Class D Common Stock [Member] | Maximum
STOCKHOLDERS' EQUITY
Stock repurchase , Authorized amount | $	$ 500,000
Common Class D [Member]
STOCKHOLDERS' EQUITY
Common stock, par value (in dollars per share) | $ / shares																					$ 0.001
Stock repurchase , Authorized amount remaining | $																$ 443,000
Stock Repurchased During Period, Shares																	6,715
Stock Repurchased During Period, Value | $																	$ 39,000
Repurchase Of Common Stock Price Per Share | $ / shares																	$ 5.80
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																								8,250,000
Additional shares authorized					5,519,575
Common Class D [Member] | Share Repurchase Program One
STOCKHOLDERS' EQUITY
Stock Repurchased During Period, Shares																4,779,969
Stock Repurchased During Period, Value | $																$ 25,000,000.0
Repurchase Of Common Stock Price Per Share | $ / shares																$ 5.24
Common Class D [Member] | Share Repurchase Program Two
STOCKHOLDERS' EQUITY
Stock Repurchased During Period, Shares																13,577
Stock Repurchased During Period, Value | $																$ 57,000
Repurchase Of Common Stock Price Per Share | $ / shares																$ 4.23
Common Class D [Member] | Open Market Sales Agreement
STOCKHOLDERS' EQUITY
Shares issued and sold																0
Common Class D [Member] | Scenario, Plan [Member] | Open Market Sales Agreement | Maximum
STOCKHOLDERS' EQUITY
Aggregate offering price | $																					$ 25,000,000.0
Common Class D [Member] | Restricted stock awards [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures																1,357,687	101,057
Employee Service Share-based Compensation, Non-vested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition																13 months
Employee Service Share-based Compensation, Non-vested Awards, Total Compensation Cost Not yet Recognized, Stock Options | $																$ 1,400,000
Common Class D [Member] | Stock Plan 2009 [Member]
STOCKHOLDERS' EQUITY
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																									8,250,000
Common Class D [Member] | Stock Vest Tax Repurchase [Member]
STOCKHOLDERS' EQUITY
Stock Repurchased During Period, Shares																344,702	515,162
Stock Repurchased During Period, Value | $																$ 1,500,000	$ 931,000
Repurchase Of Common Stock Price Per Share | $ / shares																$ 4.29	$ 1.81
Common Class D [Member] | 2019 Equity and Performance Incentive Plan
STOCKHOLDERS' EQUITY
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant																3,656,278							5,500,000
Common Class D [Member] | Chief Financial Officer [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	115,248
Common Class D [Member] | Chief Financial Officer [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche Two [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	150,000
Number of options vested in period							211,838
Common Class D [Member] | Chief Financial Officer [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche Three [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | $							$ 243,750
Common Class D [Member] | Chief Financial Officer [Member] | Employees Stock Option [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock	58,036
Common Class D [Member] | Chief Financial Officer [Member] | Employees Stock Option [Member] | Share-based Compensation Award, Tranche Two [Member]
STOCKHOLDERS' EQUITY
Other than options, granted							94,150
Common Class D [Member] | Chief Financial Officer [Member] | Employees Stock Option [Member] | Share-based Compensation Award, Tranche Three [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock							108,333
Common Class D [Member] | Chief Administrative Officer [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	39,007
Common Class D [Member] | Chief Administrative Officer [Member] | Employees Stock Option [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock	19,643
Common Class D [Member] | Employee [Member] | Long Term Incentive Plan | Restricted stock awards [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	195,032
Common Class D [Member] | Employee [Member] | Long Term Incentive Plan | Employees Stock Option [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock	208,298
Common Class D [Member] | Chief Executive Officer and President [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche Three [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures							711,914
Common Class D [Member] | Chief Executive Officer and President [Member] | Employees Stock Option [Member] | Share-based Compensation Award, Tranche Three [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock							316,406
Common Class D [Member] | Four Non-Executive Directors [Member]
STOCKHOLDERS' EQUITY
Restricted stock issued				9,671
Common Class D [Member] | Four Non-Executive Directors [Member] | Restricted stock awards [Member]
STOCKHOLDERS' EQUITY
Stock issued during period, value, restricted stock award fair value | $		$ 50,000		$ 50,000
Number of non-executive directors, received awards | director				4												4
Vesting period		2 years		2 years
Restricted stock issued		11,848
Common Class D [Member] | Cathy Hughes [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	201,961
Common Class D [Member] | Cathy Hughes [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche Three [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures							427,148
Common Class D [Member] | Cathy Hughes [Member] | Employees Stock Option [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock	101,702
Common Class D [Member] | Cathy Hughes [Member] | Employees Stock Option [Member] | Share-based Compensation Award, Tranche Three [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock							189,843
Common Class D [Member] | C.Kristopher Simpson | Restricted stock awards [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	23,936
Common Class D [Member] | C.Kristopher Simpson | Employees Stock Option [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock	12,054
Common Class D [Member] | Chief Executive Officer | Restricted stock awards [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock	169,503
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	100,160
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | $	$ 336,602
Common Class D [Member] | Chief Executive Officer | Employees Stock Option [Member] | Share-based Compensation Award, Tranche One [Member]
STOCKHOLDERS' EQUITY
Stock options to purchase common stock	50,438
Common Stock Class [Member] | Restricted stock awards [Member]
STOCKHOLDERS' EQUITY
Employee Service Share-based Compensation, Non-vested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition																24 months
Other than options, granted																750,000	750,000
Average fair value at grant date (in dollars per share) | $ / shares																$ 5.39	$ 5.39
Other than options, vested In period																0	0
Other than options, unvested, number																750,000
Other than options, unvested, weighted average grant date fair value | $ / shares																$ 5.39
Total unrecognized compensation, other than options | $																$ 3,600,000
Class A Common Stock [Member]
STOCKHOLDERS' EQUITY
Stock Repurchased During Period, Shares																	0
Shares issued and sold			883,890
Number of votes | Vote																1
Additional shares authorized					2,000,000
Class A Common Stock [Member] | Share Repurchase Program One
STOCKHOLDERS' EQUITY
Stock Repurchased During Period, Shares																0
Class A Common Stock [Member] | Current ATM Program
STOCKHOLDERS' EQUITY
Common stock, par value (in dollars per share) | $ / shares																						$ 0.001
Volume weighted average price | $ / shares																		$ 5.39
Net proceeds after associated fees and expenses | $										$ 21,200,000	$ 2,800,000							$ 14,700,000
Shares issued and sold										1,893,126	420,439							2,859,276
Number of additional shares issued and sold								1,465,826
Class A Common Stock [Member] | 2020 Open Market Sale Agreement
STOCKHOLDERS' EQUITY
Net proceeds after associated fees and expenses | $						$ 9,300,000
Class A Common Stock [Member] | Restricted stock awards [Member]
STOCKHOLDERS' EQUITY
Other than options, granted																	0
Class A Common Stock [Member] | 2019 Equity and Performance Incentive Plan
STOCKHOLDERS' EQUITY
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant																1,250,000
Class A Common Stock [Member] | Chief Executive Officer and President [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche Two [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | $	$ 468,750
Class A Common Stock [Member] | Cathy Hughes [Member] | Restricted stock awards [Member] | Share-based Compensation Award, Tranche Two [Member]
STOCKHOLDERS' EQUITY
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	281,250
Common Stock Class B
STOCKHOLDERS' EQUITY
Common stock, par value (in dollars per share) | $ / shares																$ 0.001	$ 0.001
Number of votes | Vote																10
Common stock, shares issued																2,861,843	2,861,843
Common Stock Class C
STOCKHOLDERS' EQUITY
Common stock, par value (in dollars per share) | $ / shares																$ 0.001	$ 0.001
Shares converted			883,890
Common stock, shares issued																2,045,016	2,045,016