RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue	$ 71,500	$ 71,926	$ 75,680	$ 92,495	$ 109,203	$ 113,475	$ 100,565	$ 98,833	$ 168,174	$ 199,398	$ 240,099	$ 312,873	$ 311,600	$ 422,077	$ 383,432
Net loss before income taxes	(19,805)	(9,359)	(2,798)	(8,612)	(9,800)	806	(6,963)	(469)	(11,410)	(7,431)	(20,769)	(6,626)	(40,575)	(16,428)	39,696
Deferred revenue, current portion	78,511	73,240	70,696	76,688	79,807	70,876	69,499	74,130	70,696	69,499	73,240	70,876	78,511	79,807	87,128
Deferred revenue, net of current portion	38,176	37,281	35,337	35,685	35,495	36,220	36,480	37,391	35,337	36,480	37,281	36,220	38,176	35,495	39,788
Warrant fair value adjustments	2,203	(2,213)	(4,402)	(726)	430	(4)	(3,092)	(7,582)	(5,128)	(10,675)	(7,341)	(10,678)	(5,137)	(10,250)	(60,030)
Warrant liabilities	4,046	1,843	4,056	8,457	7,989	7,559	7,563	10,655	4,056	7,563	1,843	7,559	4,046	7,989	18,237
Additional paid-in capital	$ 707,116	706,133	705,229	704,309	702,370	699,536	696,567	693,895	705,229	696,567	706,133	699,536	707,116	702,370	624,805
As previously reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue				91,787		111,196	99,137	97,074		196,212		307,407		412,752	372,827
Net loss before income taxes				(10,046)		(1,477)	(11,483)	(9,810)		(21,292)		(22,770)		(36,003)	(30,939)
Deferred revenue, current portion				79,686	82,504	72,669	70,184	74,267		70,184		72,669		82,504	86,517
Deferred revenue, net of current portion				43,903	43,306	41,076	40,165	40,196		40,165		41,076		43,306	41,580
Warrant fair value adjustments				0		0	0	0		0		0		0	0
Warrant liabilities				0	0	0	0	0		0		0		0	0
Additional paid-in capital				725,736	722,603	719,769	716,800	714,128		716,800		719,769		722,603	645,038
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue				708		2,279	1,428	1,759		3,186		5,466		9,325	10,605
Net loss before income taxes				1,434		2,283	4,520	9,341		13,861		16,144		19,575	70,635
Deferred revenue, current portion				(2,998)	(2,697)	(1,793)	(685)	(137)		(685)		(1,793)		(2,697)	611
Deferred revenue, net of current portion				(8,218)	(7,811)	(4,856)	(3,685)	(2,805)		(3,685)		(4,856)		(7,811)	(1,792)
Warrant fair value adjustments				(726)		(4)	(3,092)	(7,582)		(10,675)		(10,678)		(10,250)	(60,030)
Warrant liabilities				8,457	7,989	7,559	7,563	10,655		7,563		7,559		7,989	18,237
Additional paid-in capital				(21,427)	$ (20,233)	(20,233)	(20,233)	(20,233)		(20,233)		(20,233)		(20,233)	(20,200)
Adjustments | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2014-09
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss before income taxes														9,300	10,600
Adjustments | Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2017-12
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net loss before income taxes														10,200	60,000
Product
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue		$ 37,113	$ 42,947	58,577		77,494	64,110	61,588	$ 101,522	125,698	$ 138,635	203,192	174,879	274,854	230,814
Product | As previously reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue				57,447		75,420	62,967	60,211		123,178		198,597		266,537	223,761
Product | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue				$ 1,130		$ 2,074	$ 1,143	$ 1,377		$ 2,520		$ 4,595		8,317	7,053
Service
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue													$ 113,868	124,599	131,967
Service | Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue														$ 1,000	$ 3,600