Acquisitions - Eyechronic (Details) $ / shares in Units, $ in Thousands		6 Months Ended
	Jan. 14, 2022 USD ($) $ / shares shares	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)
Consideration Transferred:
Holdback liability recognized in connection with acquisition		$ 98	$ 0
Assets acquired:
Goodwill		$ 67,156		$ 45,295
Liabilities assumed:
Number of operating segments | segment		1
Eyechronic LLC
Consideration Transferred:
Cash consideration	$ 697
Share consideration	28,725
Total consideration	29,422
Settlement of pre-existing accounts payable	200
Holdback liability recognized in connection with acquisition	$ 100
Share consideration (in shares) | shares	5,399,553
Share price (in dollars per share) | $ / shares	$ 5.32
Share consideration, holdback (in shares) | shares	677,847
Assets acquired:
Cash	$ 118
Accounts receivable	835
Other current assets	37
Fixed assets	2,826
Goodwill	21,861
Total assets acquired	30,008
Liabilities assumed:
Other liabilities	(22)
Total liabilities assumed	(586)
Transaction expenses		$ 100
Eyechronic LLC | Software technology
Assets acquired:
Intangibles	826
Liabilities assumed:
Accounts payable	(460)
Total net assets acquired	29,422
Eyechronic LLC | Trade name
Assets acquired:
Intangibles	103
Liabilities assumed:
Other current liabilities	(8)
Eyechronic LLC | Customer relationships
Assets acquired:
Intangibles	3,203
Liabilities assumed:
Deferred revenue	(96)
Eyechronic LLC | Order Backlog
Assets acquired:
Intangibles	$ 199