STOCKHOLDERS' EQUITY AND EARNINGS PER SHARE - Narrative (Details)						1 Months Ended	12 Months Ended
	Sep. 25, 2019 USD ($) $ / shares shares	Apr. 01, 2019 USD ($)	Jan. 11, 2019 $ / shares shares	May 31, 2018 USD ($) $ / shares shares	Feb. 09, 2018 $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) fiscal_quarter $ / shares shares	Dec. 31, 2014 USD ($) shares	Feb. 28, 2018 USD ($) $ / shares shares	Dec. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, shares outstanding							16,558,759	16,726,610
Cash dividends on redeemable convertible preferred stock | $							$ (4,010,000)	$ (2,548,000)
Vesting period								3 years
Deemed dividend on redeemable convertible preferred stock | $							$ (2,545,000)	$ (3,493,000)
Preferred stock optional redemption percentage							15.00%
Ratio used to determine conversion price							2.25
Treasury stock purchase (in shares)			500,000
Treasury stock acquired, average cost per share | $ / shares			$ 2.00
Designation restrictive covenants, judgment threshold | $							$ 2,000,000
Options granted (in shares)							117,449	110,979
Exercise price of shares granted (in dollars per share) | $ / shares							$ 2.69	$ 2.42
Forfeitures in period (in shares)							(67,715)	(63,849)
Shares outstanding							1,152,361	1,102,627			1,055,497
Options, vested, number of shares							1,046,195.33333333
Warrant or right, outstanding							2,600,000
Stock-based compensation and option amortization | $							$ 539,000	$ 426,000
Preferred stock dividends | $							2,017,000	1,188,000
Proceeds from issuance of preferred equity | $							6,000,000	30,000,000
DRD Gross-Up Distribution
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividends on redeemable convertible preferred stock | $							$ (300,000)	$ (200,000)
Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance							2,700,000
Number of additional shares authorized							3,300,000
Stock Incentive Plan 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period							3 years	3 years
Fair per share granted (in dollars per share) | $ / shares							$ 1.09	$ 0.73
Options granted (in shares)							117,449	110,979
Exercise price of shares granted (in dollars per share) | $ / shares							$ 2.69	$ 1.81
Forfeitures in period (in shares)								(63,849)
Stock-based compensation and option amortization | $							$ 641,000	$ 510,000
Share-based compensation cost not yet recognized | $							$ 1,100,000
Period of recognition							1 year 5 months 19 days
Stock Incentive Plan 2010 | $1.81 Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (in shares)								30,000
Stock Incentive Plan 2010 | $2.65 Exercise Price
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (in shares)								80,979
Fair per share granted (in dollars per share) | $ / shares								$ 1.06
Exercise price of shares granted (in dollars per share) | $ / shares								$ 2.65
2014 Non-Employee Director Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized for issuance									300,000
Annual grant of restricted common stock, value | $							$ 20,000
JPMorgan Chase Funding Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant, authorized issuance					600,000
Warrant, period					2 years
Warrant, exercise price per share (in USD per share) | $ / shares					$ 2.25
Common Class B1, B2 and B3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Predetermined lapse internal one in transfer restriction term							6 months
Predetermined lapse internal two in transfer restriction term							9 months
Predetermined lapse internal three in transfer restriction term							12 months
Length of period after initial public offering in conversion term							5 months
Threshold percentage of offering price (greater than 125%)							125.00%
Period to reach threshold percentage of offering price term							20 days
Class B-1 Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class C Common Stock conversion percentage							25.00%
Class B-2 Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class C Common Stock conversion percentage							25.00%
Class B-3 Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class C Common Stock conversion percentage							50.00%
Class B-4 Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Length of period after initial public offering in conversion term							4 years
Convertible conversion rate							1
Threshold book value of entity in transfer restriction term | $							$ 730,400,000
Series B-1 and B-2 Cumulative Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock issued (in shares)									8,200,000
Deemed dividend on redeemable convertible preferred stock | $									$ 26,400,000
Preferred distribution rate							8.00%
Cash dividends on redeemable convertible preferred stock | $							$ (3,460,000)	$ (2,140,000)
Preferred dividends per share (in dollars per share) | $ / shares							$ (0.28)	$ (0.20)
Cash consent payment | $							$ (1,300,000)
Cash consent payment (in dollars per share) | $ / shares							$ (0.11)
Preferred stock redemption price							150.00%
Preferred stock, liquidation preference, percent							150.00%
Preferred stock, value, issued | $							$ 26,400,000
Preferred stock, redemption amount | $							39,600,000
Preferred stock redemption premium | $							$ 13,200,000
Preferred Stock, shares issued upon conversion							8,200,000
Series B-1 and B-2 Cumulative Convertible Preferred Stock | JPMorgan Chase Funding Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Warrant, period		1 year
Proceeds from issuance of preferred equity | $		$ 2,600,000					$ 2,600,000
Series B-1 and B-2 Cumulative Convertible Preferred Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock redemption price							160.00%
Series B-3 Cumulative Convertible Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred distribution rate							5.65%
Cash dividends on redeemable convertible preferred stock | $							$ (458,000)	$ (408,000)
Preferred dividends per share (in dollars per share) | $ / shares							$ (0.04)	$ (0.04)
Preferred stock redemption price							145.00%
Preferred stock, liquidation preference, percent							145.00%
Preferred stock, value, issued | $								$ 8,000,000
Preferred stock, redemption amount | $							$ 11,600,000
Preferred stock redemption premium | $								3,600,000
Preferred Stock, shares issued upon conversion							2,400,000
Preferred stock par value (in dollars per share) | $ / shares										$ 0.01
Series B-3 Cumulative Convertible Preferred Stock | JPMorgan Chase Funding Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock issued (in shares)										2,352,941
Price of stock issued (in usd per share) | $ / shares										$ 3.40
Preferred stock, purchase price, value | $										$ 8,000,000
Series B-3 Cumulative Convertible Preferred Stock | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock redemption price							145.00%
Series B-4 Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash dividends on redeemable convertible preferred stock | $							$ (92,000)
Preferred dividends per share (in dollars per share) | $ / shares							$ (0.01)
Preferred stock, value, issued | $							$ 6,000,000
Preferred stock, redemption amount | $							$ 8,700,000
Preferred stock redemption premium | $								2,700,000
Preferred Stock, shares issued upon conversion							1,900,000
Estimated fair value per share | $ / shares							$ 3.20
Preferred stock par value (in dollars per share) | $ / shares	$ 0.01
Preferred stock, purchase price, value | $							$ 6,000,000
Series B-4 Preferred Stock | JPMorgan Chase Funding Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock issued (in shares)	1,875,000					1,875,000
Preferred distribution rate						5.65%
Proceeds from issuance of preferred equity | $	$ 6,000,000					$ 6,000,000
Preferred stock par value (in dollars per share) | $ / shares						$ 0.01
Preferred stock purchase price (in dollars per share) | $ / shares	$ 3.20					$ 3.20
Series B Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock dividend rate percentage additional shares							8.00%
Preferred stock, redemption, minimum percentage of share holders							85.00%
Preferred stock, redemption notice							30 days
Deemed dividend on redeemable convertible preferred stock | $							$ 2,545,000	$ 3,493,000
Gross proceeds of underwritten public offering in conversion terms | $							$ 75,000,000
Preferred stock, vote on as-converted, minimum percent of original issue							50.00%
Preferred stock, trigger for redemption, number of quarters dividend, not paid in full | fiscal_quarter								2
Preferred stock, redemption period after trigger for redemption								180 days
Covenant, maximum excess of certain expenses over approved budget, percent							103.00%
Covenant, excess of certain expenses over approved budget, percent, actual							103.00%
Series A Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred distribution rate							7.50%
Cash dividends on redeemable convertible preferred stock | $							$ (2,000,000)	$ (1,200,000)
Series A Preferred Stock | JPMorgan Chase Funding Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred stock issued (in shares)				22,000				22,000
Estimated fair value per share | $ / shares				$ 1,000
Preferred stock, purchase price, value | $				$ 22,000,000				$ 22,000,000
Class B Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividends payable amount per share (in dollars per share) | $ / shares							$ 0.95
Dividends, share holding period							12 months
Treasury stock purchase (in shares)			477,170
Relinquishment of common stock to treasury							573
Class B Common Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Threshold amount of new equity securities issued in conversion term | $							$ 50,000,000
Threshold maturity term of new indebtedness in conversion term							1 year
Class C Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of net proceeds used in pro rata redemption							30.00%
Maximum net proceeds used in pro rata redemption | $							$ 50,000,000
Treasury stock purchase (in shares)			22,830
Relinquishment of common stock to treasury								44,068
Class D Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, shares outstanding							0	0
Length of period after initial public offering in conversion term							12 months
Period prior to representation submitted by shareholder in conversion term							90 years
Conversion of stock, shares issued							1
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, granted							443,372	249,496
Non-option equity instruments, outstanding							552,228	523,754			791,510
Restricted Stock | 2014 Non-Employee Director Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options, vested, weighted average grant date fair value | $ / shares							$ 1.65	$ 2.67
Restricted Stock | Certain Executives
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, granted							474,405	114,865
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (in shares)							332,722	517,252
Common Stock | 2014 Non-Employee Director Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (in shares)								74,136
Tranche One | Common Stock | 2014 Non-Employee Director Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (in shares)								44,132
Fair per share granted (in dollars per share) | $ / shares								$ 1.81
Tranche Two | Common Stock | 2014 Non-Employee Director Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation (in shares)								30,004
Fair per share granted (in dollars per share) | $ / shares								$ 2.67