CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 48,478	$ 50,895
Prepaid expenses and other current assets (Note 7)	1,609	1,975
Total current assets	50,087	52,870
Non-current assets:
Property and equipment, net	714	753
Right-of-use assets	1,945	2,025
Restricted cash and other long-term assets	287	301
Total assets	53,033	55,949
Current liabilities:
Accounts payable	732	919
Accrued expenses and other current liabilities	4,810	6,018
Deferred grant income		1,075
Current portion of lease liabilities	345	334
Current portion of long-term debt	5,992
Total current liabilities	11,879	8,346
Long-term liabilities:
Long-term lease liabilities	1,715	1,799
Long-term debt	28,510	34,190
Long-term contingent consideration	4,268	4,110
Total long-term liabilities	34,493	40,099
Total liabilities	46,372	48,445
Commitments and Contingencies (Note 17)
Stockholders' equity:
Common stock, $0.001 par value; 120,000,000 shares authorized as of December 31, 2023 and 2022; 2,759,372 and 1,706,971 shares issued and outstanding as of December 31, 2023 and 2022, respectively	3	3
Additional paid-in capital	647,874	636,910
Accumulated deficit	(641,216)	(629,409)
Total stockholders' equity	6,661	7,504
Total liabilities and stockholders' equity	$ 53,033	$ 55,949

Amount of cash and other long-term assets restricted as to withdrawal or usage, classified as noncurrent.

No definition available.

Name:	kala_RestrictedCashAndOtherAssetsNoncurrent
Namespace Prefix:	kala_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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).