CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Cash flows from operating activities:
Net loss	$ (5,902)	$ (2,729)	$ (16,704)	$ 68	$ (9,740)	$ (17,959)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and accretion	1,872		1,378		4,993	3,491
Provision for bad debts					693	493
Provision for obsolete inventory					1,240	965
Equity based compensation	1,000		400		1,838	754
Deferred income tax					(4,065)	13,809
Changes in operating assets and liabilities:
Accounts receivable					(3,318)	2,434
Inventories					1,466	(3,564)
Other current assets					(1,934)	(277)
Other assets					158	(239)
Accounts payable					(3,715)	(1,453)
Accrued salaries and benefits					1,479	(253)
Accrued expenses					2,936	(1,270)
Customer deposits and deferred service revenue					1,107	1,967
Other long-term liabilities					(2,758)	(874)
Net cash used in operating activities					(9,620)	(1,976)
Cash flows from investing activities:
Acquisition					(7,000)	0
Capital expenditures					(2,352)	(3,001)
Capitalization of software costs					(2,283)	(3,066)
Proceeds from real estate					0	1,126
Net cash used in investing activities					(11,635)	(4,941)
Cash flows from financing activities:
Payments of long-term debt					0	(145)
Payment of contingent consideration for Brink Earn Out					(2,550)	0	$ (2,600)
Payments of bank borrowings					(17,459)	(28,921)
Proceeds from bank borrowings					9,640	34,936
Proceeds from notes payable, net of issuance costs					75,039	0
Proceeds from exercise of stock options					283	749
Net cash provided by financing activities					64,953	6,619
Effect of exchange rate changes on cash and cash equivalents					(236)	(485)
Net increase (decrease) in cash and cash equivalents					43,462	(783)
Cash and cash equivalents at beginning of period		$ 3,485		$ 6,600	3,485	6,600	6,600
Cash and equivalents at end of period	$ 46,947		$ 5,817		46,947	5,817	$ 3,485
Cash paid during the period for:
Interest					153	206
Income taxes, net of refunds					125	$ 142
Additions to right-of-use assets and deferred rent obtained from operating lease liabilities					$ 3,048