Consolidated Statements of Cash Flows - USD ($) $ in Thousands		12 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Operating Activities
Net (loss) income		$ (5,162)	$ 5,305	$ 8,086
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization		1,690	1,854	2,493
Non-cash impairment charges			7,006
Write-down of inventory		3,193	542	420
Capitalized interest		106	143	277
Provision for (reversal of) allowance for doubtful accounts		1,074	45	(720)
Deferred income taxes		220	209	(27)
Non-cash share based compensation expense		573	855	1,328
(Gain) loss on sale of property, plant and equipment		(11)	(92)	26
Gain on sale of subsidiary		(1,614)
Gain on sale of other assets			(2,883)
(Income) loss from equity method investment			(234)	417
Changes in operating assets and liabilities:
Accounts receivable		299	3,274	(8,655)
Inventory		(435)	3,965	(6,638)
Contract and other assets		12,847	10,649	(8,898)
Accounts payable		(1,787)	(10,164)	5,374
Accrued income taxes		(3,011)	(1,749)	573
Accrued and other liabilities		(6,876)	1,960	1,913
Contract liabilities		(933)	(34,453)	38,082
Net cash provided by (used in) operating activities		173	(13,768)	34,051
Investing Activities
Purchases of property, plant and equipment		(714)	(1,495)	(1,256)
Proceeds from sale of property, plant and equipment			114	40
Net cash disposed of in sale of subsidiary		(1,112)
Proceeds from sale of other assets			5,732
Net cash (used in) provided by investing activities		(1,826)	4,351	(1,216)
Financing Activities
Proceeds from issuance of common stock, net		210	1,892	12,602
Repurchase of common stock			(4,000)
Payments on long-term debt		(376)	(368)	(674)
Borrowings on long-term debt		9		755
Excess tax benefit of stock compensation				18
Net cash (used in) provided by financing activities		(157)	(2,476)	12,701
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash		(1,552)	(1,372)	1,677
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash		(3,362)	(13,265)	47,213
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	[1]	62,496	75,761	28,548
Cash, Cash Equivalents and Restricted Cash, End of Year	[1]	59,134	62,496	75,761
Supplemental Cash Flow Information:
Income tax (payments) refunds, net		993	(980)	146
Interest paid, net of capitalized interest		$ 262	304	269
Supplemental Non-cash Financing and Investing Activities:
Transfer inventory to property, plant, and equipment			$ 902	120
Transfer of property, plant, and equipment to inventory				22
Net of acquired non-controlling interest over debt forgiveness (See Note 16)				$ (332)

[1] Includes Cash, Cash Equivalents and Restricted Cash that are included in Held-For-Sale Assets on the Consolidated Balance Sheets.