Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating Activities
Net (loss) income	$ (2,372)	$ 6,452
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Depreciation and amortization	443	471
Write-down of inventory	557	41
Capitalized interest	106	143
Deferred income taxes	7	(7)
Non-cash share based compensation expense	169	253
Loss from equity method investment	0	26
Provision for allowance for doubtful accounts, net	44	48
Changes in operating assets and liabilities:
Accounts receivable	(2,568)	(8,869)
Inventories	228	7,558
Contract and other assets	7,939	6,974
Accounts payable	520	(1,255)
Accrued income taxes	831	1,087
Accrued and other liabilities	(684)	731
Contract liabilities	(5,866)	(28,275)
Net cash used in operating activities	(646)	(14,622)
Investing Activities
Purchases of property, plant and equipment	(152)	(93)
Net cash used in investing activities	(152)	(93)
Financing Activities
Proceeds from the exercise of stock options	37	1,199
Payments on long-term debt	(95)	(89)
Net cash (used in) provided by financing activities	(58)	1,110
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	(662)	453
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(1,518)	(13,152)
Cash, Cash Equivalents and Restricted Cash, Beginning of Period	62,496	$ 75,761
Cash, Cash Equivalents and Restricted Cash, End of Period	$ 55,969