RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Consolidated Statements of Income (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total revenue	$ 22,892	$ 15,765	$ 59,529	$ 44,695
Total cost of revenue	15,246	10,701	39,681	30,849
Gross profit	7,646	5,064	19,848	13,846
Total operating expenses	9,349	5,541	22,058	15,538
Operating loss	(1,703)	(477)	(2,210)	(1,692)
Interest expense	(449)	(382)	(1,163)	(1,085)
Other income (expense)	1	1	180	13
Income tax expense (benefit)	(4,753)	21	(4,706)	129
Net income (loss)	$ 2,602	$ (879)	$ 1,513	$ (2,893)
Basic net income (loss) per share (in dollars per share)	$ 0.18	$ (0.08)	$ 0.12	$ (0.27)
Diluted net income (loss) per share (In dollar per share)	$ 0.17	$ (0.08)	$ 0.12	$ (0.27)
Basic (in shares)	14,656	10,910	12,274	10,807
Diluted (in shares)	15,383	10,910	12,948	10,807
As Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total revenue	$ 22,892		$ 59,529
Total cost of revenue	15,246		39,681
Gross profit	7,646		19,848
Total operating expenses	9,349		22,058
Operating loss	(1,703)		(2,210)
Interest expense	(449)		(1,163)
Other income (expense)	1		180
Income tax expense (benefit)	114		161
Net income (loss)	$ (2,265)		$ (3,354)
Basic net income (loss) per share (in dollars per share)	$ (0.15)		$ (0.27)
Diluted net income (loss) per share (In dollar per share)	$ (0.15)		$ (0.27)
Basic (in shares)	14,656		12,274
Diluted (in shares)	14,656		12,274
Restated Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income tax expense (benefit)	$ (4,867)		$ (4,867)
Net income (loss)	$ 4,867		$ 4,867
Diluted (in shares)	727		674