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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss from operations		$ (16,811)	$ (3,699)
Adjustments to reconcile net loss from operations to net cash provided by (used in) operations:
Depreciation and amortization of intangible assets		6,760	9,193
Loss on disposal of assets		8	75
Deferred tax benefit		(3,701)	(356)
Stock-based compensation		2,981	3,231
Changes in operating assets and liabilities:
Accounts receivable, net		11,480	8,589
Inventories, net		1,101	5,790
Contract assets		3,764	(379)
Accounts payable		2,347	(5,551)
Income taxes payable		(2,661)	(5,985)
Accrued expenses		(27)	(3,694)
Deferred compensation		(897)	322
Deferred revenue		(1,860)	3,268
Other assets and liabilities		(6,913)	(3,376)
Net cash provided by (used in) operating activities		(4,429)	7,429
Cash flows from investing activities:
Purchase of short term investments		(45,882)	(23,295)
Maturities of short term investments		33,129	21,980
Additions to property and equipment		(1,529)	(2,710)
Other		(17)	(98)
Net cash used in investing activities		(14,299)	(4,123)
Cash flows from financing activities:
Repurchase of common stock		(7,471)
Tax payments for restricted stock issuances		(2,782)	(1,963)
Net cash used in financing activities		(10,253)	(1,963)
Effect of exchange rate changes on cash		(760)	306
Net increase (decrease) in cash		(29,741)	1,649
Cash, cash equivalents, and restricted cash, beginning of period		89,241	85,129
Cash, cash equivalents, and restricted cash, end of period	[1]	59,500	86,778
Supplemental cash flow disclosures:
Restricted Cash		$ 900	$ 800
[1] End of period cash, cash equivalents, and restricted cash includes $0.9 million and $0.8 million of restricted cash at September 30, 2021 and September 30, 2020, respectively.

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