CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash Flows From Operating Activities:
Net Loss	$ (8,439)	$ (18,679)
Adjustments To Reconcile Net Loss To Net Cash Used In Operating Activities:
Depreciation and Amortization	1,444	576
Stock-based Compensation	932	315
Increase in Inventory Reserves	1,098	610
Non-cash Lease Expense from Right of Use Assets	2,010	2,013
Amortization of Debt Financing Costs and Accretion of Debt Discount and Premium	1,107	369
Loss (Gain) on Disposal of Assets	1	(3)
Realized Gain on Sale of Investments	(321)	(4)
Changes in Assets and Liabilities:
Accounts Receivable, net	(4,642)	(346)
Inventory	1,176	(2,101)
Prepaid and Other Assets	1,410	2,720
Accounts Payable	463	314
Lease Liabilities	(1,465)	(1,421)
Accrued and Other Liabilities	(376)	2,534
Deferred License Revenue	(3,810)	(3,826)
Changes in Operating Assets and Liabilities	(7,244)	(2,126)
Cash Used In Operating Activities	(9,412)	(16,929)
Cash Flows From Investing Activities:
Purchase of Investments Available-for-Sale	(5,701)	(21,297)
Sale of Investments Available-for-Sale	15,301	19,182
Purchase of Equipment	(284)	(281)
Cash Paid in Connection with Evoqua Asset Acquisition	(12,361)	0
Cash Used In Investing Activities	(3,045)	(2,396)
Cash Flows From Financing Activities:
Payments on Debt	(2,000)	(11,750)
Payments on Insurance Financing Note Payable	(992)	(1,443)
Payments on Financing Lease Liabilities	(522)	(482)
Proceeds from Issuance of Common Stock	14,861	15,016
Offering Costs from Issuance of Common Stock	(5)	(106)
Proceeds from Issuance of Preferred Stock	0	15,000
Offering Costs from Issuance of Preferred Stock	0	(85)
Cash Provided By Financing Activities	11,342	16,150
Effect of Exchange Rate Changes on Cash and Cash Equivalents	(4)	(3)
Decrease In Cash and Cash Equivalents	(1,119)	(3,178)
Cash and Cash Equivalents At Beginning Of Year	10,102	13,280
Cash and Cash Equivalents At End Of Year	8,983	10,102
Supplemental Disclosure of Cash Flow Information:
Cash Paid for Interest	1,209	1,470
Supplemental Disclosure of Noncash Investing and Financing Activities:
Change in Unrealized (Loss) Gain on Marketable Securities Available-for-Sale	(159)	114
Increase in Prepaid Assets from Insurance Financing Note Payable	733	503
Fair Value of Warrants issued related to Debt Financing	0	501
Deferred Consideration from Evoqua Asset Acquisition	$ 5,000	$ 0