Accrued expenses and other liabilities consisted of the following for the periods indicated:


	June 30,		December 31,
	2025		2024
Accrued compensation and related liabilities	$	1,270,051	$	1,008,278
Deferred revenue		152,254		218,499
Customer deposits		-		26,607
Warranty reserve		554,786		501,726
Trade and other taxes		765,203		495,105
Other accrued expenses		773,760		2,556,461
	$	3,516,054	$	4,806,675

The table below presents the deferred revenue, warranties and deposit balances along with the significant activity affecting balances during the six month periods ended June 30, 2025 and 2024:


	June 30,			June 30,
Deferred revenue	2025			2024
Beginning balance	$	218,499		$	299,514
Deferral of revenue during the period		1,309,550			52,405
Recognition of unearned revenue from beginning of period		(173,768	)		(98,816	)
Recognition of unearned revenue from additions		(1,202,027	)		(1,881	)
Ending balance	$	152,254		$	251,222


	June 30,			June 30,
Customer deposits	2025			2024
Beginning balance	$	(26,607	)	$	27,447
Additions during the period		(768,856	)		3,275,864
Deposits recognized from beginning of period		-			(1,756,282	)
Deposits recognized from additions		795,463			(280,552	)
Ending balance	$	-		$	1,266,477

As of June 30, 2025, the Company had approximately $4,171,013 of remaining performance obligations under fully funded contracts for which the Company's performance obligations are satisfied over time and for which the customer receives benefits as the Company performs. These performance obligations are expected to be satisfied within 2025.

Revenue from customers with non-U.S. billing addresses represented approximately 63% and 63% of the Company’s revenue during the three month periods ended June 30, 2025 and 2024, respectively, and 63% and 61% for the six month periods ended June 30, 2025 and 2024, respectively.

As of June 30, 2025, substantially all the Company’s long-lived assets are in the United States of America, except for assets of $452,380 located in Germany.