PREFERRED STOCK - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands										1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 25, 2021	Jul. 22, 2021	Jun. 22, 2021	Dec. 23, 2020	Dec. 10, 2020	Jul. 16, 2020	Jul. 13, 2020	Jun. 07, 2018	Oct. 20, 2017	Dec. 31, 2020	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020	Dec. 27, 2020	Jun. 08, 2020	Jun. 27, 2018	Jun. 08, 2018
Class of Stock [Line Items]
Preferred stock, outstanding (in shares)											1,643,272		1,643,272		1,183,272
Value of stock issued												$ 6,033	$ 8,246	$ 6,033
Proceeds from preferred stock													8,246	8,021
Redeemable preferred stock											$ 66,810		$ 66,810		$ 0
Number of shares designated (in shares)											15,000,000		15,000,000		5,000,000
Redemption of shares, value	$ 8,000
Preferred stock, issued (in shares)											1,643,272		1,643,272		1,183,272
Preferred stock, par value (in dollars per share)											$ 0.0001		$ 0.0001		$ 0.0001
Loss on extinguishment of debt	$ 13										$ 13	88	$ 6,418	88
Redeemable shares outstanding											3,089,245		3,089,245
Derivative Liability							$ 1,500									$ 2,400
Change in fair value of derivative liability							$ 900				$ 0	(374)	$ 0	887
GFG Holdings Inc
Class of Stock [Line Items]
Purchase price of business		$ 444,500
Equity interests transferred		$ 67,500
Special Dividend
Class of Stock [Line Items]
Number of preferred shares issued (in shares)				520,145
Value of stock issued				$ 8,900
Series B Preferred Offering
Class of Stock [Line Items]
Net proceeds on sale of stock						$ 8,100
Underwriting and offering costs						$ 900
Series B Cumulative Preferred Stock
Class of Stock [Line Items]
Dividend rate on preferred stock			8.25%		8.25%
Number of preferred shares issued (in shares)			460,000
Shares issued (in dollars per share)			$ 20.00
Proceeds from preferred stock			$ 8,300
Underwriting discounts and other offering expenses			$ 900
Series B Cumulative Preferred Stock | GFG Holdings Inc
Class of Stock [Line Items]
Equity consideration transferred (in shares)		3,089,245
2020 Series B Offering Warrants
Class of Stock [Line Items]
Class of warrant outstanding (in shares)							1,800,000
Exercise price of warrants (in dollars per share)							$ 5.00
Additional warrants, underwriter's overallotment option (in shares)							99,000
Series B Preferred Stock
Class of Stock [Line Items]
Preferred stock, outstanding (in shares)							57,140				1,643,272		1,643,272
Payment of accrued dividends (in shares)							3,537
Carrying value of preferred stock											$ 37,900		$ 37,900
Preferred dividends declared											900		2,100
Preferred stock, issued (in shares)	478,199
Preferred stock, par value (in dollars per share)	$ 20
Series B Preferred Stock | Special Dividend
Class of Stock [Line Items]
Stock dividends (in shares)										0.2319998077
Series A Preferred Stock
Class of Stock [Line Items]
Number of shares designated (in shares)																		100,000
Number of exchanged outstanding shares of preferred stock (in shares)	80,000
Dividends on preferred stock	$ 1,600
Interest expense											$ 200	$ 400	$ 700	$ 1,100
Series A Preferred Stock | Holders
Class of Stock [Line Items]
Shares issued (in dollars per share)											$ 100.00		$ 100.00
Series A Preferred Shareholders agreeing to cash redemption (in shares)							85,000
Series A Preferred Stock | FCCG
Class of Stock [Line Items]
Number of exchanged outstanding shares of preferred stock (in shares)							15,000
Series A Preferred Stock | FCCG | Holders
Class of Stock [Line Items]
Preferred stock, outstanding (in shares)							15,000
Series A Preferred Stock | Trojan Investments LLC
Class of Stock [Line Items]
Redemption of shares (in shares)							80,000
Agreed semi-annual redemption payment							$ 2,000
Series A Preferred Stock | Ridgewood Select Value Fund LP
Class of Stock [Line Items]
Number of redeemed outstanding shares of preferred stock (in shares)							5,000
Series-A 1 Fixed Rate Cumulative Preferred Stock
Class of Stock [Line Items]
Preferred stock exchanged (in shares)							168,001
Underwriting Agreement | Series B Cumulative Preferred Stock
Class of Stock [Line Items]
Public offering of stock (in shares)							360,000
Dividend rate on preferred stock							8.25%
Underwriting Agreement | Series B Preferred Stock | FCCG
Class of Stock [Line Items]
Stock issued, conversion of convertible securities (in shares)							74,449
Underwriting Agreement | Series A Fixed Rate Cumulative Preferred Stock | FCCG
Class of Stock [Line Items]
Preferred stock exchanged (in shares)							15,000
Subscription Agreement
Class of Stock [Line Items]
Public offering of stock (in shares)								800
Sale of stock (in dollars per share)								$ 10,000
Proceeds from Issuance Initial Public Offering								$ 8,000
Subscription Agreement | Series A Preferred Stock
Class of Stock [Line Items]
Number of preferred shares issued (in shares)								80,000
Subscription Agreement | Series A Fixed Rate Cumulative Preferred Stock
Class of Stock [Line Items]
Number of shares issued per unit (in shares)								100
Number of warrants to purchase common shares per unit (in shares)								127
Subscription Agreement | Series A Warrants
Class of Stock [Line Items]
Exercise price of warrants (in dollars per share)								$ 7.83
Subscription Agreement | Subscription Warrants
Class of Stock [Line Items]
Number of securities called by each warrant (in shares)								102,125
Note Exchange Agreement | Warrant
Class of Stock [Line Items]
Exercise price of warrants (in dollars per share)									$ 7.83
Number of securities called by each warrant (in shares)									25,530
Note Exchange Agreement | Promissory Note
Class of Stock [Line Items]
Notes exchange agreement																	$ 2,000
Note Exchange Agreement | Series A Fixed Rate Cumulative Preferred Stock
Class of Stock [Line Items]
Number of units converted (in shares)									200
Debt converted (in shares)									20,000
Debt converted (in dollars per share)									$ 100