Quarterly Financial Information (Unaudited) - Condensed Consolidated Statement of Cash Flows (Detail) - USD ($) $ in Thousands	3 Months Ended							6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net income (loss)	$ (713)	$ (1,843)	$ (1,268)	$ (1,047)	$ (2,500)	$ (9)	$ (39)	$ (3,111)	$ (48)	$ (3,824)	$ (2,548)	$ (5,595)	$ (3,595)
Income (loss) from continuing operations							122		245		(2,248)	(5,595)	(3,235)
Adjustments to reconcile net loss to net cash provided by operating activities:
Additions to media library			(2,452)				(2,803)	(5,210)	(5,100)	(7,396)	(7,482)	(8,621)	(9,840)
Equity method investment loss	125	125	125		125	125	125	250	250	375	375	501	511
Net cash provided by operating activities - continuing operations							1,361		1,588		891	5,870	2,040
Net cash provided by operating activities			686				1,200	1,270	1,295	2,685	591	5,870	1,680
Cash flows from investing activities:
Additions to media library, property and equipment			(1,418)				(2,178)	(1,909)	(4,472)	(2,975)	(6,574)	(5,274)	(8,417)
Net cash used in investing activities			(1,418)				(3,025)	(1,909)	(5,319)	(2,975)	(7,421)	(5,282)	(9,264)
Cash flows from financing activities:
Proceeds from short-term borrowings			6,300					12,600		19,900
Repayment of debt			(6,304)					(12,686)		(19,985)		(38,072)	(7,666)
Net cash (used in) provided by financing activities			18					(44)		(43)		$ (4,384)	8,877
As Previously Reported
Cash flows from operating activities:
Net income (loss)	(588)	(1,718)	(1,143)	(922)	(2,375)	116	86	(2,861)	202	(3,449)	(2,173)		(3,095)
Income (loss) from continuing operations							247		495		(1,873)		(2,735)
Adjustments to reconcile net loss to net cash provided by operating activities:
Net cash provided by operating activities - continuing operations							4,164		6,688		8,373		11,880
Net cash provided by operating activities			3,138				4,003	6,480	6,395	10,081	8,073		11,520
Cash flows from investing activities:
Additions to media library, property and equipment			(3,870)				(4,981)	(7,119)	(9,572)	(10,371)	(14,056)		(18,257)
Net cash used in investing activities			(3,870)				(5,828)	(7,119)	(10,419)	(10,371)	(14,903)		(19,104)
Cash flows from financing activities:
Proceeds from short-term borrowings			7,500					12,600		19,900
Repayment of debt			(7,504)					(12,686)		(19,985)			(166)
Net cash (used in) provided by financing activities			18					(44)		(43)			8,877
Adjustment
Cash flows from operating activities:
Net income (loss)	(125)	(125)	(125)	$ (125)	(125)	(125)	(125)	(250)	(250)	(375)	(375)		(500)
Income (loss) from continuing operations							(125)		(250)		(375)		(500)
Adjustments to reconcile net loss to net cash provided by operating activities:
Additions to media library			(2,452)				(2,803)	(5,210)	(5,100)	(7,396)	(7,482)		(9,840)
Equity method investment loss	$ 125	$ 125	125		$ 125	$ 125	125	250	250	375	375		500
Net cash provided by operating activities - continuing operations							(2,803)		(5,100)		(7,482)		(9,840)
Net cash provided by operating activities			(2,452)				(2,803)	(5,210)	(5,100)	(7,396)	(7,482)		(9,840)
Cash flows from investing activities:
Additions to media library, property and equipment			2,452				2,803	5,210	5,100	7,396	7,482		9,840
Net cash used in investing activities			2,452				$ 2,803	$ 5,210	$ 5,100	$ 7,396	$ 7,482		9,840
Cash flows from financing activities:
Proceeds from short-term borrowings			(1,200)
Repayment of debt			$ 1,200										$ (7,500)