CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2026	Dec. 31, 2025
Current assets:
Cash and cash equivalents	$ 252,322	$ 210,160
Accounts receivable, net of allowance for expected credit losses of $1,588 and $1,593 at September 30, 2026 and December 31, 2025, respectively	54,014	61,837
Prepaid expenses and other current assets	11,859	14,476
Total current assets	318,195	286,473
Intangible assets, net	10,749	12,722
Goodwill	51,903	51,903
Deferred tax assets, net	4,855	9,400
Total assets	405,780	378,302
Current liabilities:
Accounts payable and accrued expenses	37,029	59,543
Accrued payroll and related liabilities	3,529	3,352
Other current liabilities	4,239	5,626
Total current liabilities	44,797	68,521
Other liabilities, non-current	4,580	4,045
Total liabilities	49,377	72,566
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock	8	7
Additional paid-in capital	604,564	577,043
Treasury stock	(10,025)	(10,025)
Notes receivable from employees	(187)	(181)
Accumulated deficit	(237,957)	(261,108)
Total stockholders’ equity	356,403	305,736
Total liabilities and stockholders’ equity	405,780	378,302
Software, In-Development, Internally Developed, and Purchased
Current assets:
Internal use software, net	$ 20,078	$ 17,804

Intangible Assets, Net, Excluding Goodwill and Internal-Use Software

No definition available.

Name:	mntn_IntangibleAssetsNetExcludingGoodwillAndInternalUseSoftware
Namespace Prefix:	mntn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.