Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current Assets:
Cash and cash equivalents	$ 5,894	$ 8,863
Short-term investments	14,487	0
Prepaid expenses and other current assets	519	554
Total current assets	20,900	9,417
In-process research and development asset	8,819	8,819
Total assets	29,719	18,236
Current Liabilities:
Accounts payable	544	670
Accrued and other liabilities	2,615	1,254
Liabilities of discontinued operations, current portion	650	723
Total current liabilities	3,809	2,647
Warrant liability	2,376	1,061
Liability related to the sale of future payments	6,499	6,527
Total liabilities	12,684	10,235
Commitments and Contingencies
Stockholders’ Equity:
Common stock, $0.001 par value—200,000,000 shares authorized as of December 31, 2025 and 2024; 49,328,097 and 17,029,469 shares issued and outstanding as of December 31, 2025 and 2024, respectively	49	17
Additional paid-in capital	488,506	465,214
Accumulated deficit	(471,520)	(457,230)
Total stockholders’ equity	17,035	8,001
Total Liabilities and Stockholders’ Equity	$ 29,719	$ 18,236

Amount of liability related ot the sale of future payments

No definition available.

Name:	tlph_LiabilitiesRelatedToTheSaleOfFuturePayments
Namespace Prefix:	tlph_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).